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300 answers
Heating Safety and urgent help
My furnace smells like gas each time it starts. Is that normal?
Air conditioning Diagnosis and repair
The outdoor fan runs, but the AC is not cold at the first spring startup
Heat pumps Design, installation and home fit
Could an air-source heat pump work at 8,000 feet in a cold, windy Colorado home?
Mini splits Comfort and hot-water delivery
Can one mini-split cool bedrooms with the doors closed at night?
Water heaters Safety and urgent help
A water-heater leak is coming through the ceiling near lights. What should I do first?
Heat-pump water heaters Leaks, odors and noise
Will a heat-pump water heater disturb nearby bedrooms?
Indoor air quality Air quality, filtration and humidity
Why is there dust inside the furnace after the filter?
Heating Diagnosis and repair
The gas smell returns after four service visits and a replaced gas valve.
Air conditioning Diagnosis and repair
My AC pipe is frozen. Do I really need a whole new air conditioner?
Heat pumps Energy use and bills
Without solar, will a heat pump make my Denver winter bills much higher?
Mini splits Design, installation and home fit
Is the smallest mini-split head still too large for my tiny bedroom?
Water heaters Costs, quotes and choosing help
My water-heater replacement quote seems very high. How should I compare it?
Heat-pump water heaters Design, installation and home fit
Can heat-pump water-heater exhaust go into an attic or near soffit vents?
Indoor air quality Air quality, filtration and humidity
What should I address first when my home is dusty and very dry?
Heating Safety and urgent help
The furnace gives a strong whoosh after gas seems to flow before ignition.
Air conditioning Diagnosis and repair
Why does my AC airflow get weak after a few hours?
Heat pumps Design, installation and home fit
Does my small Denver condo need a large heat pump and built-in backup, or can I use space heaters?
Mini splits Design, installation and home fit
What mini-split options fit a room with low ceilings?
Water heaters Design, installation and home fit
Why am I being offered a commercial water heater for my home?
Heat-pump water heaters Design, installation and home fit
Is a garage that drops below freezing a workable heat-pump water-heater location?
Indoor air quality Air quality, filtration and humidity
How do I compare an electronic air cleaner, a regular filter, and an ionizer?
Heating Controls and operation
The blower keeps running after the heat shuts off on a very old furnace.
Air conditioning Diagnosis and repair
Why does my new AC keep freezing after repeated service visits?
Heat pumps Design, installation and home fit
Denver installers disagree about keeping gas backup in my older home. Who is right?
Mini splits Design, installation and home fit
Can I mount a mini split low on the wall in northwest Colorado?
Water heaters Diagnosis and repair
Why have my water heaters needed repeated replacement over eight years?
Heat-pump water heaters Comfort and hot-water delivery
Should I choose a larger tank when switching to a heat-pump water heater?
Indoor air quality Care and maintenance
What care should I expect from an electronic air cleaner?
Heating Repair versus replacement
I want a repair assessment instead of being told to replace an old furnace.
Air conditioning Controls and operation
Why does my new variable-speed AC run in five-minute bursts?
Heat pumps Design, installation and home fit
The cold-weather performance tables are overwhelming. How do I choose a heat pump for my Colorado A-frame?
Mini splits Design, installation and home fit
Can ductless mini splits replace failed central AC in my large Denver home?
Water heaters Leaks, odors and noise
Why is the relief valve dripping again days after replacement?
Heat-pump water heaters Comfort and hot-water delivery
Will a heat-pump water heater make my finished basement uncomfortable?
Indoor air quality Air quality, filtration and humidity
How can I add humidity in Colorado without creating mold conditions?
Heating Costs, quotes and choosing help
Two furnace replacement quotes differ sharply for comparable models.
Air conditioning Controls and operation
Should I worry about shorter AC cycles after replacing my windows?
Heat pumps Energy use and bills
My Denver heat-pump quote promises summer and winter savings. How should I check each claim?
Mini splits Design, installation and home fit
How should I add cooling to a century-old Denver home with a hot converted attic?
Water heaters Controls and operation
Why does my gas water-heater pilot keep going out?
Heat-pump water heaters Energy use and bills
Does a heat-pump water heater add to my home’s winter heating use?
Indoor air quality Air quality, filtration and humidity
How can I reduce smoke inside my home during Colorado wildfire season?
Heating Costs, quotes and choosing help
How much of an installed furnace quote is equipment versus installation work?
Air conditioning Diagnosis and repair
Why does my AC stop cooling for days, then work again?
Heat pumps Controls and operation
Why do Denver installers recommend different temperatures for switching a heat pump to the furnace?
Mini splits Comfort and hot-water delivery
Can a mini split warm one cold room in Longmont while I keep my furnace?
Water heaters Diagnosis and repair
Can I trust a normal status light when my water-heater flame looks wrong?
Heat-pump water heaters Air quality, filtration and humidity
Will a heat-pump water heater lower basement humidity enough to help?
Indoor air quality Air quality, filtration and humidity
Why does my humidifier leave white powder around the house?
Heating Diagnosis and repair
A failed furnace blower also stopped my air conditioning before a heat wave.
Air conditioning Comfort and hot-water delivery
How can I cool upstairs bedrooms when downstairs is comfortable?
Heat pumps Controls and operation
Should I keep a heat pump at one temperature or turn it down at night and when away?
Mini splits Design, installation and home fit
Where should our mini-split heads and outdoor lines go?
Water heaters Safety and urgent help
My water heater has burned-looking insulation and no hot water. What comes first?
Heat-pump water heaters Leaks, odors and noise
Could my heat-pump water heater’s outside condensate line freeze?
Indoor air quality Repair versus replacement
Is a whole-home humidifier worth repairing after repeated basement leaks?
Heating Comfort and hot-water delivery
South-facing upstairs bedrooms are colder in winter than the rest of the home.
Air conditioning Leaks, odors and noise
Why is my attic AC leaking onto the ceiling when the visible pan is dry?
Heat pumps Design, installation and home fit
Can I add a heat pump in Longmont and keep my four-year-old furnace?
Mini splits Incentives, permits and warranties
Can I install my own mini split in Denver and still get a rebate?
Water heaters Safety and urgent help
What should I do about scorch marks near my water-heater exhaust?
Heat-pump water heaters Diagnosis and repair
Why is my new heat-pump water heater alarming and spilling water from its side?
Indoor air quality Controls and operation
How should I change an existing whole-home humidifier for the seasons?
Heating Design, installation and home fit
The furnace in a home I may buy was made in 1988. What should I investigate?
Air conditioning Leaks, odors and noise
Is water from my outdoor AC drain a risk to the foundation?
Heat pumps Incentives, permits and warranties
Should I take an upfront heat-pump rebate discount or pay first and wait for the paperwork?
Mini splits Design, installation and home fit
Is this Denver mini-split quote fair when it includes so much work?
Water heaters Leaks, odors and noise
Why does hot water still smell like rotten eggs after several anode replacements?
Heat-pump water heaters Leaks, odors and noise
Why does my heat-pump water heater ask me to clean the condensate line every few weeks?
Indoor air quality Diagnosis and repair
Is my whole-home humidifier using too much water or hot water?
Heating Design, installation and home fit
The high-altitude furnace manual does not match the gas heat-value number I found online.
Air conditioning Leaks, odors and noise
Why does my indoor AC keep leaking at night and humming loudly?
Heat pumps Incentives, permits and warranties
I have Longmont electricity and Xcel gas. Could I still get an Xcel heat-pump incentive?
Mini splits Design, installation and home fit
Are ceiling cassettes less reliable than wall-mounted mini splits?
Water heaters Care and maintenance
Can removing the anode to stop an odor create another problem?
Heat-pump water heaters Diagnosis and repair
What if the heat-pump section fails but electric mode still heats water?
Indoor air quality Design, installation and home fit
Should I wait for HVAC replacement before replacing my humidifier?
Heating Diagnosis and repair
A working furnace is called defective because it was built with bad parts.
Air conditioning Safety and urgent help
What should I do if my AC trips a breaker, whines, and produces smoke?
Heat pumps Design, installation and home fit
Is a remote photo estimate enough for my Longmont heat-pump project?
Mini splits Design, installation and home fit
Is the more expensive mini-split brand worth paying for?
Water heaters Leaks, odors and noise
How can I tell whether hot-water odor comes from the heater or the well?
Heat-pump water heaters Incentives, permits and warranties
Why can I still pay labor when a heat-pump water heater fails under warranty?
Indoor air quality Leaks, odors and noise
Will an air purifier fix stale or unpleasant basement or crawlspace air?
Heating Incentives, permits and warranties
Does a Colorado emissions-law change mean I must replace my working furnace?
Air conditioning Safety and urgent help
What should I do about hissing and a burning smell after an AC repair?
Heat pumps Costs, quotes and choosing help
How do I find someone who can properly retune my Longmont heat-pump installation?
Mini splits Leaks, odors and noise
My mini split is leaking onto the floor. What can I safely check?
Water heaters Leaks, odors and noise
Why does my water heater still pop after its yearly flush?
Heat-pump water heaters Controls and operation
Why does my water heater wait for a schedule change before reheating?
Indoor air quality Leaks, odors and noise
How can I stop cat-litter odor from spreading through the HVAC system?
Heating Costs, quotes and choosing help
Can I replace two heating systems in stages rather than all four HVAC units at once?
Air conditioning Repair versus replacement
Does a leaking coil mean my six-year-old AC needs replacement?
Heat pumps Design, installation and home fit
Does every heat pump need pipes buried in the yard?
Mini splits Leaks, odors and noise
Why does my mini split still drip after the drain was cleared?
Water heaters Care and maintenance
Should an older water heater that has never been flushed be flushed now?
Heat-pump water heaters Diagnosis and repair
Why does my heat-pump water heater work again only after a power reset?
Indoor air quality Leaks, odors and noise
Will a whole-home air cleaner remove paint or wood-stain smells?
Heating Costs, quotes and choosing help
Financing seems to increase the quoted installed-system price.
Air conditioning Incentives, permits and warranties
Can I replace an R22 coil, or is R22 banned in Colorado?
Heat pumps Design, installation and home fit
With existing ducts in my Denver home, should I choose a central heat pump or ductless units?
Mini splits Design, installation and home fit
My new mini split drains only after suction. Should the installer add a pump?
Water heaters Safety and urgent help
Is household descaler safe inside a drinking-water heater?
Heat-pump water heaters Costs, quotes and choosing help
How do I find an installer who understands heat-pump water heaters?
Indoor air quality Costs, quotes and choosing help
Is an ultraviolet air-cleaning add-on worth the cost?
Heating Incentives, permits and warranties
Are older furnace models being priced higher because of new Colorado rules?
Air conditioning Diagnosis and repair
Did my AC really need yearly refrigerant if a different fault was found?
Heat pumps Controls and operation
Why is my heat pump defrosting when it is above freezing outside?
Mini splits Safety and urgent help
Oily fluid came from the mini split in my child's room. What should I do?
Water heaters Leaks, odors and noise
Does water near the drain valve mean my tank has failed?
Heat-pump water heaters Care and maintenance
Can workshop dust affect a garage heat-pump water heater?
Indoor air quality Air quality, filtration and humidity
Which air cleaner fits dust and mold-spore concerns after moisture remediation?
Heating Costs, quotes and choosing help
How do I tell a real heating diagnosis from a replacement sales pitch?
Air conditioning Costs, quotes and choosing help
How can I confirm R22 service before paying for a diagnostic visit?
Heat pumps Controls and operation
My new heat pump keeps defrosting for hours with short breaks. Is that normal?
Mini splits Diagnosis and repair
My DIY mini split will not cool and now freezes and spits water. What next?
Water heaters Safety and urgent help
How should I manage a leaking old heater while waiting for replacement?
Heat-pump water heaters Comfort and hot-water delivery
Will moving my water heater farther away make hot-water waits worse?
Indoor air quality Air quality, filtration and humidity
Which indoor-air measurements are useful, and can I trust my monitor?
Heating Design, installation and home fit
Should a heating replacement be sized larger for Colorado cold snaps?
Air conditioning Costs, quotes and choosing help
What if I cannot afford an AC replacement after freezing in Denver?
Heat pumps Leaks, odors and noise
Why does my heat pump get so loud during defrost?
Mini splits Leaks, odors and noise
My mini split still smells musty after a deep cleaning. Is it mold?
Water heaters Leaks, odors and noise
Why is my new water heater leaking at the drain-valve threads?
Heat-pump water heaters Design, installation and home fit
How should a Denver water-heater replacement fit a planned solar installation?
Indoor air quality Air quality, filtration and humidity
How can I get fresh air when wildfire smoke makes opening windows difficult?
Heating Diagnosis and repair
The furnace fails for hours or days but works when the technician arrives.
Air conditioning Costs, quotes and choosing help
Should I pay a large deposit for a low AC quote?
Heat pumps Care and maintenance
What care does my ducted heat pump need beyond a filter change?
Mini splits Leaks, odors and noise
Cleaning and a UV light have not stopped my mini-split odor. What should I try?
Water heaters Leaks, odors and noise
Why does the drain pan fill when the cup below the valve stays dry?
Heat-pump water heaters Design, installation and home fit
Will cold incoming water reduce heat-pump hot-water delivery in Denver?
Indoor air quality Air quality, filtration and humidity
Where should I start with dust, pet dander, and musty rooms in an older home?
Heating Safety and urgent help
I bypassed furnace limit switches while chasing repeated shutdowns.
Air conditioning Costs, quotes and choosing help
How should I compare AC and furnace bundles with financing in Longmont?
Heat pumps Care and maintenance
Did my heat-pump maintenance visit miss useful checks?
Mini splits Care and maintenance
I neglected my mini-split filters all winter. Could that explain dust and high heating use?
Water heaters Leaks, odors and noise
Why is water leaking near both the heating element and drain?
Heat-pump water heaters Design, installation and home fit
What changes when my crawl space loses warmth from its old gas furnace?
Indoor air quality Air quality, filtration and humidity
Will a higher-rated furnace filter restrict my HVAC airflow?
Heating Controls and operation
The furnace shuts down only when the thermostat calls for second-stage heat.
Air conditioning Incentives, permits and warranties
Which refrigerant model should I buy for a new AC in Denver?
Heat pumps Care and maintenance
Do I need to be handy to own a heat pump?
Mini splits Controls and operation
Why does one bedroom get much hotter than its mini-split setting?
Water heaters Diagnosis and repair
Why is my electric water heater lukewarm when its breaker has not tripped?
Heat-pump water heaters Design, installation and home fit
Can a heat-pump water heater get enough air in a narrow dirt niche?
Indoor air quality Design, installation and home fit
Why doesn't my small purifier clear smoke across the rest of the house?
Heating Diagnosis and repair
The furnace stops below target but shows a normal status light.
Air conditioning Diagnosis and repair
Does hail damage to my nearly new condenser need repair?
Heat pumps Design, installation and home fit
Does my outdoor heat pump need risers for snow?
Mini splits Controls and operation
Why must I set the remote so high to get the room warm?
Water heaters Diagnosis and repair
Why does my new electric heater make warm water and trip its breaker?
Heat-pump water heaters Design, installation and home fit
How should I size a new water heater when a tenant will increase hot-water use?
Indoor air quality Air quality, filtration and humidity
How do I compare quiet room purifiers with a whole-home air cleaner?
Heating Controls and operation
The furnace fan ramps up repeatedly even after the thermostat is disconnected.
Air conditioning Diagnosis and repair
What evidence helps when an insurer disputes a hail-related AC leak?
Heat pumps Safety and urgent help
Can my generator power a replacement central heat pump?
Mini splits Comfort and hot-water delivery
Why will my mini split not give more heat as the room gets colder?
Water heaters Safety and urgent help
Can I restart a new water heater after a breaker trip and possible wire burns?
Heat-pump water heaters Incentives, permits and warranties
How do I check whether an online Colorado water-heater rebate claim applies now?
Indoor air quality Safety and urgent help
How do I verify that a proposed air cleaner does not add ozone?
Heating Controls and operation
The furnace starts again briefly after reaching the thermostat target.
Air conditioning Care and maintenance
How can I safely clean cottonwood trapped behind condenser panels?
Heat pumps Safety and urgent help
How will solar and batteries heat my home during an outage?
Mini splits Controls and operation
Dry mode feels better than cooling. Will it cost more or wear out the compressor?
Water heaters Diagnosis and repair
Why did replacing an element fail to fix my heater's lukewarm water?
Heat-pump water heaters Design, installation and home fit
Why would a 120-volt heat-pump water heater need a panel upgrade?
Indoor air quality Air quality, filtration and humidity
What if mold and chemical tests find nothing, but an air concern continues?
Heating Diagnosis and repair
A new two-stage furnace cycles every few minutes from its first day.
Air conditioning Care and maintenance
How can I reduce recurring cottonwood buildup on my AC?
Heat pumps Safety and urgent help
Why does emergency heat blow room-temperature air when auxiliary heat works?
Mini splits Controls and operation
How should I switch my multi-head mini split between warm days and cold nights?
Water heaters Controls and operation
Why did my electric water heater stop heating after a thermostat adjustment?
Heat-pump water heaters Safety and urgent help
Can I leave backup-element wires unconnected to reduce electrical demand?
Indoor air quality Care and maintenance
How can I judge the installed cost and value of a whole-home air cleaner?
Heating Diagnosis and repair
Heating trouble returned after a condensate-related fault was cleared.
Air conditioning Incentives, permits and warranties
Why was condenser cleaning charged during a warranty callback?
Heat pumps Energy use and bills
Why does my heat pump run nearly nonstop and cost more after a Nest installation?
Mini splits Controls and operation
I have one remote and three mini-split heads. What is each unit actually set to?
Water heaters Diagnosis and repair
Why does my water heater overheat and need resetting after a repair?
Heat-pump water heaters Design, installation and home fit
What temporary electrical supply can I use before the panel upgrade?
Heating Diagnosis and repair
The burners go out before the blower starts. Why does the furnace keep retrying?
Air conditioning Care and maintenance
Is one combined furnace and AC visit enough for seasonal care?
Heat pumps Comfort and hot-water delivery
Why does auxiliary heat still run after I added attic insulation?
Mini splits Diagnosis and repair
My mini split shows a code that is not in the user manual. Is it a fault?
Water heaters Diagnosis and repair
Why does turning up my new heater not make the tap water hotter?
Heat-pump water heaters Safety and urgent help
Why does my generator overload when it powers only the heat-pump water heater?
Heating Safety and urgent help
Why do I smell gas outside near the furnace exhaust on very cold days?
Air conditioning Care and maintenance
My AC has gone years without maintenance. Is every other year enough?
Heat pumps Comfort and hot-water delivery
Why is my basement colder after switching to a heat pump?
Mini splits Diagnosis and repair
My mini split shuts down with E1. The installer says it is normal, but the manual disagrees. Who is right?
Water heaters Care and maintenance
How can my tankless heater be maintained without service valves?
Heat-pump water heaters Design, installation and home fit
Why does the supply look different from my heater's single-phase wiring diagram?
Heating Safety and urgent help
The utility found no leak. Why does the furnace exhaust still smell unusually strong?
Air conditioning Care and maintenance
I'm new to central AC. Should I run it, cover it, or switch its power off for winter?
Heat pumps Comfort and hot-water delivery
Why does my new heat pump cool quickly but leave the house humid?
Mini splits Incentives, permits and warranties
My mini-split coil is covered, but the repair and parts delay are costly. Should I replace the unit?
Water heaters Comfort and hot-water delivery
Why does my tankless water turn cold when I barely open the tap?
Heat-pump water heaters Comfort and hot-water delivery
How long will a 120-volt heater take to provide a shower after a long outage?
Heating Safety and urgent help
The gas utility and HVAC company disagree. Who decides whether my furnace is safe?
Air conditioning Diagnosis and repair
A tune-up found a bad compressor test, worn pipe insulation, and a sinking AC pad. Do I need replacement?
Heat pumps Energy use and bills
Why does my hybrid system cost more and lack the expected thermostat setting?
Mini splits Incentives, permits and warranties
Is a very long installer labor warranty worth paying extra for?
Water heaters Comfort and hot-water delivery
Why does my new tankless heater alternate between hot and cold?
Heat-pump water heaters Design, installation and home fit
How do I prevent gaps between the plumber, electrician, and room contractor?
Heating Safety and urgent help
The furnace runs poorly and we get headaches, but our CO alarm reads zero. Can we keep using it?
Air conditioning Design, installation and home fit
My old AC failed, but the label is unreadable and the home warranty wants a make and model. What now?
Heat pumps Comfort and hot-water delivery
Why won't my heat pump reach its published minimum power?
Water heaters Diagnosis and repair
Why did my tankless hot-water flow slow again just weeks after descaling?
Heat-pump water heaters Design, installation and home fit
Does filter access leave enough room to service the fan or motor?
Heating Safety and urgent help
A new furnace still has a strong gas-like smell. Is that a normal new-equipment smell?
Air conditioning Comfort and hot-water delivery
Can my AC really cool only 20 degrees below the outdoor temperature?
Heat pumps Diagnosis and repair
Why do two technicians disagree about my heat pump's refrigerant charge?
Water heaters Care and maintenance
How often should my tankless water heater be descaled?
Heat-pump water heaters Care and maintenance
Does hard well water change heat-pump water-heater maintenance or life?
Heating Repair versus replacement
My old furnace was red-tagged. Could cleaning the heat exchanger make it usable again?
Air conditioning Design, installation and home fit
My new AC runs all day at the set temperature, and a tune-up found installation gaps. Is that normal?
Heat pumps Design, installation and home fit
Should I remove my newer furnace when adding a heat pump?
Water heaters Care and maintenance
Can a dirty tankless air filter cause a startup error?
Heat-pump water heaters Care and maintenance
Is filter cleaning the only care a heat-pump water heater needs?
Heating Diagnosis and repair
A technician said the heat exchanger was safe because the flame looked fine. Is that enough?
Air conditioning Design, installation and home fit
Is buying a Denver home without central AC manageable?
Heat pumps Energy use and bills
My electric bill tripled after a heat-pump conversion. Did I make a mistake?
Water heaters Safety and urgent help
What should I do with an outdoor tankless heater during a freezing power outage?
Heat-pump water heaters Care and maintenance
Why does the dirty-filter warning return mainly in summer?
Heating Diagnosis and repair
Do these photos prove my furnace has a cracked heat exchanger?
Air conditioning Design, installation and home fit
In Denver, should we choose central AC or evaporative cooling?
Heat pumps Energy use and bills
Can an efficient heat pump cost more to run than my furnace?
Water heaters Safety and urgent help
How should a drained tankless heater be restarted after power returns?
Heat-pump water heaters Design, installation and home fit
Is four-hour recovery after a short shower normal?
Heating Repair versus replacement
The technician says the heat exchanger is cracked. Can I wait until summer?
Water heaters Design, installation and home fit
How does high altitude affect propane tankless selection?
Heating Diagnosis and repair
My furnace light keeps blinking red, but the heat works. Is it a warning?
Water heaters Design, installation and home fit
What replacement fits a crawl space too short for a standard water-heater tank?
Heating Incentives, permits and warranties
The heat exchanger is under warranty. Why am I being charged for the repair?
Water heaters Design, installation and home fit
Why do tankless installers disagree about needing a bigger gas line?
Heating Incentives, permits and warranties
The manufacturer says my furnace is registered at another address. How do I fix that?
Water heaters Incentives, permits and warranties
Why does a home warranty cover the tank but leave large replacement charges?
Heating Costs, quotes and choosing help
A furnace problem turned into a quote for a furnace, AC, and water heater. Do I need all three?
Water heaters Design, installation and home fit
Who handles water damage after a water-heater leak, and who replaces the heater?
Heating Design, installation and home fit
The home inspector said the furnace was healthy. Why did a later technician condemn it?
Heating Costs, quotes and choosing help
My warranty heat exchanger will take months to arrive. Do I have to buy a furnace now?
Heating Care and maintenance
We bought the house, and I cannot find the furnace filter. Where should I look?
Heating Care and maintenance
Are modern air filters only suitable for high-efficiency furnaces?
Heating Care and maintenance
I did not know the furnace filter needed changing. Have I damaged the system?
Heating Diagnosis and repair
The furnace hits its temperature limit after I install a higher-rated filter. Is the filter the problem?
Heating Care and maintenance
Can my older furnace use a thick media-filter cabinet?
Heating Care and maintenance
Which way should the arrow on my furnace filter point?
Heating Care and maintenance
Should I change the filter monthly or every three months?
Heating Design, installation and home fit
Does the furnace need a different filter from the AC?
Heating Care and maintenance
What care does a brand-new furnace need?
Heating Care and maintenance
A replacement filter with the same printed size does not fit the cabinet.
Heating Care and maintenance
What does a professional furnace check include that I cannot do myself?
Heating Care and maintenance
A maintenance visit lasted only minutes and included no tests. Was it useful?
Heating Care and maintenance
Should a furnace check specifically inspect combustion safety on an old unit?
Heating Care and maintenance
Is a maintenance membership better value than individual visits?
Heating Controls and operation
There is a C terminal at the furnace but no common wire at my thermostat.
Heating Controls and operation
My smart thermostat's remote temperature sensor stopped connecting after installation.
Heating Controls and operation
The furnace works, but my smart thermostat keeps using up batteries.
Heating Controls and operation
Heating passed a thermostat installation test months ago but fails when winter arrives.
Heating Controls and operation
My electric heating equipment has no labeled common terminal for a smart thermostat.
Heating Controls and operation
The thermostat reports loss of power around a utility-installed control switch.
Heating Safety and urgent help
Reusing the fan wire powered the thermostat but I lost independent fan control.
Heating Controls and operation
Why are the two wires that run my old furnace not enough to power a smart thermostat?
Heating Controls and operation
Will a new thermostat work with my existing equipment interface module?
Heating Leaks, odors and noise
A loud furnace sound starts when heating ends and lasts about a minute.
Heating Leaks, odors and noise
A boom at the vents appeared after a larger replacement furnace was installed.
Heating Leaks, odors and noise
The furnace is so loud we have to shout to talk at home.
Heating Leaks, odors and noise
How can I tell whether the loud motor noise is the inducer or the blower?
Heating Leaks, odors and noise
The furnace squeals and rattles as its fans slow down.
Heating Leaks, odors and noise
Can I quiet the furnace closet without blocking the air it needs?
Heating Safety and urgent help
A strange furnace noise starts before heating in extreme cold and advice conflicts.
Heating Care and maintenance
Correcting the filter direction made the furnace suddenly much louder.
Heating Safety and urgent help
I turned down the blower speed to reduce noise, but it barely helped.
Heating Diagnosis and repair
My furnace intake freezes solid again soon after I clear a small opening.
Heating Leaks, odors and noise
A condensate drain froze inside a warm basement.
Heating Safety and urgent help
A repair stopped freezing by closing the combustion-air duct. Is that safe?
Heating Safety and urgent help
Snow buries the furnace intake and the house loses heat
Heating Leaks, odors and noise
Wind pushes furnace exhaust toward the intake and creates frost
Heating Safety and urgent help
Power came back after a winter storm, but the furnace will not heat
Heating Diagnosis and repair
A new furnace repeatedly locks out because frost covers its intake
Heating Leaks, odors and noise
Water seems to leak from furnace exhaust or intake pipe joints
Heating Comfort and hot-water delivery
Will a variable-speed furnace fix uneven temperatures between floors?
Heating Care and maintenance
Is a high-efficiency furnace more complicated to maintain?
Heating Design, installation and home fit
How do I compare a two-stage standard furnace with a single-stage high-efficiency one?
Heating Costs, quotes and choosing help
Is two-stage heat worth paying for if we may move in five years?
Heating Design, installation and home fit
The contractor quoted a smaller furnace than an online calculator suggests
Heating Costs, quotes and choosing help
Furnace bids include different filter cabinets, warranties, and first-year care
Heating Design, installation and home fit
Contractors give widely different furnace sizes for the same home
Heating Design, installation and home fit
Should a replacement match the old furnace's BTU input or its heat output?
Heating Design, installation and home fit
A larger furnace quote is cheaper. Is oversizing still a problem?
Heating Design, installation and home fit
Adding AC came with a recommendation for a larger furnace
Heating Diagnosis and repair
I replaced the igniter and flame sensor, but the furnace still will not start
Heating Diagnosis and repair
The small exhaust fan runs, but the igniter never glows
Heating Safety and urgent help
Are pressure switches with the same printed rating interchangeable?
Heating Diagnosis and repair
My furnace makes startup noises, but the inducer does not seem to start
Heating Safety and urgent help
Bypassing a pressure switch caused forceful ignition and a gas smell
Heating Diagnosis and repair
Burners light, but the main blower never starts and heating shuts down
Heating Controls and operation
The furnace keeps heating after the thermostat is set to off
Heating Safety and urgent help
I came home from vacation to no heat despite leaving the thermostat on hold
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You want to care for your home.
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Know what you have.
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Warm air, a new sound, or a system that will not start. You do not need to name the failed part before exploring help.
Explore home service optionsRead about the service and what to share before requesting a visit.
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