Why the shutdown mattered
A high-temperature limit is a protective control. It can stop the burners when furnace temperatures become excessive. Restricted airflow or a blower problem can cause it to act. A shutdown therefore does not prove the limit is broken. Carrier limit-switch explanation.
Removing that response can hide the symptom while leaving the condition. A furnace continuing to run after a bypass is not evidence that it is safe or that the limit was unnecessary.
We recommend making the protective-control problem the first service priority, ahead of comfort adjustments or replacement shopping. Restoration and diagnosis belong together: reconnecting something alone does not answer why repeated shutdowns occurred.
Give the technician a complete account
Tell them which control was bypassed, when, what wires or parts were moved, and whether the furnace operated afterward. Share photos already taken. If you do not know which control it was, say that directly. Different protective switches serve different purposes; avoid labeling every one a temperature limit.
Do not return to the cabinet to improve the photo, remove the jumper, reset another switch, or experiment with a different threshold. A technician needs to verify the actual wiring and approved parts, including any damage or other changes.
What must be resolved before use?
Ask the provider to explain whether the complete approved safety circuit has been restored and which condition caused the shutdown. The professional checks may need to address airflow, blower operation, heat input, operating temperature, and the affected control, as determined by the exact model.
Ask what was checked after the work and what instructions govern continued use. If a part is defective, the replacement must match the approved requirement. A higher-temperature switch is not a way to make an overheating problem acceptable.
If replacement is recommended, ask for the confirmed condition behind that advice and any viable repair alternative. Do not turn an unsafe workaround into an automatic sales conclusion.
Your next step is to contact qualified service, disclose the bypass, and arrange safe alternative warmth while the furnace remains out of use. The goal is restored protection and a resolved cause, not a furnace that can be forced to keep burning.