Independent guide
Heat pump repair
Not heating, not cooling, or icing up. What to check and what repairs usually cost.
Check these first
- Thermostat is set to Heat and the target is above room temperature.
- Replace the thermostat batteries if it has any.
- Check the air filter.
- Make sure vents and returns are not blocked.
Still not working? That's a job for a pro.
When to call a pro
The problem is still there after these checks. Anything inside the unit is a job for a pro.
What heat pump repair usually costs
| Source | Cost, US | Page date |
|---|---|---|
| Thumbtack | $164 to $722 | Jul 2026 |
| Fixr | Average $400, range $150 to $650 | Jan 2026 |
| HomeGuide | $150 to $650 for a minor repair | Jan 2025 |
| Bob Vila | $150 to $600 | Apr 2024 |
| This Old House | Average $798 for an air-source heat pumpFrom the site's own 2026 survey of owners. | Oct 2026 |
Prices are national, not for a single city.
Questions
Why is my heat pump not heating?
Make sure the thermostat is in Heat mode and the filter is clean. Warning signs listed by the Department of Energy include a unit that runs constantly or cycles on and off, a set temperature that is never reached, or frozen coils. If you see these, call a qualified HVAC professional.
Source: bsesc.energy.gov
Why is my heat pump icing up?
In freezing weather the outdoor coil may get a bit frosted and then clear itself. Make sure the meltwater does not pool and refreeze on a walkway. If the outdoor or indoor coils stay frozen, call a qualified HVAC professional.
Source: bsesc.energy.gov
Is it normal for a heat pump to blow cool air?
Sometimes, briefly. During a defrost cycle, ducted systems may switch on supplemental heat, and ductless indoor units may put off some cooling. If the air stays cool or the room never warms, have a professional check it.
Source: bsesc.energy.gov
Why does heat pump air feel less hot than furnace air?
Heat pumps deliver a steady, gentle flow of warm air and run well when operating continuously, while fuel-fired systems blow hot air for shorter periods. Gentle air alone is not a fault, but see a professional if rooms never warm up.
Source: bsesc.energy.gov
How long does a heat pump last?
An air source heat pump typically lasts about 15 years, depending on the type and how well it is maintained. Regular filter changes and servicing every one to two years help keep it running well.
Source: bsesc.energy.gov
Describe the problem
What kind of system is it?
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