My Heat Pump Stopped Working. What Should I Do?
When a heat pump stops working, first identify whether it stopped heating, stopped cooling, stopped moving air, or shut down after an unusual noise, ice, water, or odor. Check the thermostat mode and setpoint, the accessible breaker position, and the filter. Do not open electrical panels, handle refrigerant, or keep resetting a breaker that trips. If there is smoke, a burning smell, a gas or carbon monoxide concern, or immediate electrical danger, leave the area and get emergency help before HVAC troubleshooting.
What to do when the heat pump stops
| What you notice | Safe first check | When to stop |
|---|---|---|
| Thermostat calls but the system is quiet | Confirm mode, setpoint, and display power | Stop if the breaker trips again |
| Outdoor unit is not running | Check the accessible disconnect or breaker position | Do not open the panel or handle wiring |
| Weak or no airflow | Check the filter and open supply registers | Stop if the blower makes a burning smell or loud fault noise |
| Ice on the outdoor unit or line | Turn heating or cooling off and note where the ice is | Do not chip ice or force a defrost |
| Water near indoor equipment | Turn the system off if water could reach electrical parts | Leave active electrical hazards to emergency help |
| Gas, smoke, CO, or burning odor | Leave the area and contact emergency or utility help | Do not troubleshoot the HVAC system first |
Start with the mode that failed
Heat pumps can fail in one mode and still appear normal in another. Note whether the thermostat is calling for heat or cooling, whether the indoor blower moves air, whether the outdoor fan runs, and whether the system changes behavior after a short call. A blank thermostat, tripped breaker, dirty filter, frozen coil, control fault, and refrigerant problem call for different checks.
If the unit is iced over, turn the affected mode off and let the equipment be assessed rather than scraping the ice. An emergency heat pump repair conversation should include the ice location, recent weather, thermostat mode, and any unusual sound or water.
- Record the thermostat mode and the last change you noticed.
- Check the filter without removing equipment panels.
- Keep the heat pump off when ice, water, smoke, or electrical trouble is present.
Do not let a reset hide the failure
A reset can make a control respond briefly without correcting the reason it stopped. If a breaker trips again, leave it off. If the system starts but the home remains uncomfortable, note the runtime, airflow, and supply temperature instead of cycling the thermostat repeatedly. Those observations help distinguish a control issue from an airflow, refrigerant, or equipment problem.
Once the immediate condition is safe, compare the finding with heat pump repair and ask for the failing mode to be tested. A replacement conversation belongs after the condition, repair scope, and equipment age are clear.
- Do not keep resetting a breaker or safety switch that trips.
- Ask what caused the shutdown, not only how to restart the unit.
- Keep repair and replacement decisions tied to the documented finding.
Questions homeowners ask next
My Heat Pump Stopped Working. What Should I Do?
Check the thermostat mode and setpoint, the accessible breaker position, the filter, and visible ice or water. Stop when there is smoke, burning odor, gas, carbon monoxide, repeated breaker failure, or electrical danger.
Should I turn off a heat pump covered in ice?
Yes, turn off the affected heating or cooling call and do not chip the ice or force a defrost. The ice needs to clear safely so the underlying airflow, refrigerant, coil, or control condition can be assessed.
Why did the heat pump stop after I reset the breaker?
A reset may temporarily restore operation without correcting the fault. If the breaker trips again or the system stops again, leave it off and have the cause checked instead of repeating the reset.