Why is my new heat-pump water heater alarming and spilling water from its side?

MGI’s recommendation: Call the installing contractor promptly and report both the alarm and the water. A new unit should not be treated as successfully started and tested while either problem remains unexplained. Professional startup-check guidance.

Condensate is water the heat pump collects from moisture in the surrounding air. DOE condensation explanation.

Keep away from water near electrical equipment. Do not touch controls or use electrical tools while standing in water. Request qualified electrical assessment if equipment or connections may be wet. These precautions are supported by CDC’s electrical guidance for flooded homes; they apply here to the wet-electrical hazard, not to an assumed natural-disaster diagnosis. CDC electrical safety guidance

Photograph the model label, full alarm, and visible water from a safe place. Include the time since startup, current operating mode, and where water first appeared. Do not remove covers to locate it or repeatedly clear the alarm.

Code A004 is not enough to declare a blocked condensate line. In Rheem’s AP23657 Rev 04 residential hybrid manual, it means a compressor discharge-suction trip. The same manual lists condensate blockage separately as A108. The provider must first verify that this manual applies to your actual heater. Rheem hybrid manual, alarm table

Ask the installer to identify the water source and check the condensate installation, connections, and drainage during an actual operating test. Water coming from the side does not alone establish whether it is condensate, a connection leak, or another problem. The source needs to be observed and recorded.

Separately, require the model-specific alarm diagnosis. The technician should explain the tests supporting the fault, the correction, and whether manufacturer support is needed. A condensate correction does not automatically resolve a compressor alarm, and an alarm reset does not prove the water problem is fixed.

Have the installer provide a safe shutdown or isolation plan appropriate to the conditions. If access involves wet electrical equipment, leave that work to the qualified provider. Do not bypass leak or condensate protection to maintain hot water.

Until the equipment is cleared for use, plan for another safe source of hot water. Verify the callback time and whether any separate plumbing, electrical, or restoration assessment is required.

We would close this callback only after a documented correction and a repeat test showing normal heating, drainage, and no unexplained water. Send the startup timeline and photographs, and ask the contractor to address both symptoms in the same follow-through record.