Your heat pump is an crucial part of your home because it provides year-round comfort. But, like any home comfort system, it’s likely to have some problems once in a while.

Let’s review these problems and how much they might cost to repair, so you’ll have some idea before you contact an HVAC technician. Some of the most likely heat pump repair problems include:

  • Heat pump won’t turn on
  • Heat pump won’t turn off
  • Heat pump won’t defrost
  • Heat pump won’t cool
  • Heat pump won’t turn on after changing thermostat
  • Heat pump won’t heat

1. Heat Pump Won’t Turn On

There are a lot of reasons why your heat pump won’t turn on, so we suggest checking all of them. Sometimes they are as painless as correcting a thermostat setting or swapping your air filter.

Here’s what to check:

  • Is your thermostat on the correct setting? If you want air conditioning, make sure it’s set to “cool,” “auto” and that your setting is lower than the current temperature. If you want heat, it should be set to “heat,” “auto” and your setting should be higher than the current temperature. If you have a programmable thermostat, replace the batteries if the screen looks jumbled or blank.
  • Has the circuit breaker been tripped? Your heat pump won’t be able to operate if it does not have power. Reset the corresponding breaker if it’s facing the outside of the electrical panel.
  • Is the air filter clogged? A dirty air filter is difficult for your heat pump. If you can’t see light through it, it’s time to get a new one.

If these steps don’t correct the issue, you’ll need to contact a heating and cooling company like Home Comfort Heating & Air.

Estimated Repair Cost

This problem can be complex, so how much it costs to correct it will depend on what’s wrong.

2. Heat Pump Won’t Turn Off

If it’s extremely hot or cold outside, your heat pump may need to operate longer than normal to reach your desired temperature.

If the weather is typical, check that your thermostat is set correctly and operating normally. If the fan setting is at “on,” the blower motor on your air handler will run 24/7. So, it’ll appear as though your heat pump is working all the time. Constantly using the blower can keep humidity levels under control, but it’ll also drive up your electrical bills.

If your thermostat is set correctly, there are several other problems that could be causing your heat pump to run all the time. They include:

  • A new thermostat that isn’t appropriate for your heat pump.
  • A malfunctioning compressor contactor, which controls the flow of electricity.
  • Leaky ductwork.

Estimated Repair Cost

This can be connected to a few issues, so your heat pump repair cost will depend on the problem and how elaborate it is.

3. Heat Pump Won’t Defrost

Every now and then during cold weather, your heat pump will temporarily go into cooling mode. This will melt light frost and ice that naturally accumulates on the coils. A heat pump that becomes totally frozen may struggle to heat your home or shut down altogether.

Here are a few reasons why this might be taking place:

  • Your heat pump doesn’t have sufficient airflow because it’s blocked by snow, bushes or yard debris.
  • Your gutters are dripping water on top of your heat pump, creating an icy buildup.
  • A part is not working, which may include the reversing valve, relays, controls or sensors.
  • The outdoor fan motor is damaged, dying or dead.
  • Your heat pump has a refrigerant leak. This is likely if you’re hearing bubbling or hissing sounds. Or if you find a sweet, formaldehyde-like odor around the outdoor unit.

Estimated Repair Cost

Like we discussed before, there are a lot of reasons why your heat pump won’t defrost. But here are a number estimated costs for some of these issues. Keep in mind your cost may vary based on your heat pump brand, model and the severity of the issue.

  • Replace reversing valve: $200–$600
  • Replace outdoor fan motor: $250–$650
  • Repair refrigerant leak: Depends on the kind of refrigerant your heat pump uses. R-22 Freon is more expensive since it’s no longer being manufactured.

4. Heat Pump Won’t Cool

Just like a heat pump that won’t turn on, a heat pump that won’t cool can be connected to many problems. We suggest checking for:

  • Correct thermostat settings
  • Tripped circuit breakers
  • A clogged air filter
  • Ice on your heat pump

If there’s nothing awry with your thermostat, circuit breakers or air filter, you’ll need help from an HVAC technician to diagnose a problem with your ductwork or an iced-over heat pump. Like we discussed earlier, a heat pump that won’t defrost might have a problem with its reversing valve, outdoor fan motor or a refrigerant leak.

Estimated Repair Costs

These repair costs are estimates. Your total charge may vary based on your heat pump brand, model and the extent of the problem.

  • Replace reversing valve: $200–$600
  • Replace outdoor fan motor: $250–$650
  • Repair refrigerant leak: Depends on the type of refrigerant your heat pump uses. R-22 Freon is more expensive since it’s no longer being produced.
  • Seal leaky ductwork: Depends on house size.

5. Heat Pump Won’t Turn on After Changing Thermostat

If your heat pump won’t turn on after switching the thermostat, the problem is probably tied to your new thermostat. While you can use just about any thermostat with a furnace, the same isn’t accurate for heat pumps, especially if you need backup or emergency heating.

You can check your new thermostat by switching the fan mode to “on.” If you don’t hear the blower motor start in your air handler, there’s probably a problem with the thermostat.

A couple other typical thermostat problems involve:

  • Wiring was done wrong.
  • Thermostat isn’t interacting with heat pump.
  • Thermostat is in emergency heat mode, which involves a reset.

It’s recommended to have a heating and cooling professional recommend a thermostat and expertly install it. That way, you’ll avoid any compatibility or wiring problems.

Estimated Repair Costs

The cost of professional thermostat installation depends considerably on what type of thermostat you want. While programmable thermostats are cheaper, they lack the advanced features and convenience of a smart thermostat.

6. Heat Pump Won’t Heat

A heat pump that won’t heat is linked to similar problems with a heat pump that won’t cool. We recommend checking for:

  • Appropriate thermostat settings
  • Tripped circuit breakers
  • A clogged air filter
  • Ice on your heat pump

An icy heat pump or leaky ductwork will require the help of an HVAC technician. Ductwork is hard to reach since it’s placed behind walls and several issues can cause your heat pump to ice over.

Estimated Repair Costs

These repair costs are estimates. Your total cost may vary based on your heat pump brand, model and the extent of the issue.

  • Replace reversing valve: $200–$600
  • Replace outdoor fan motor: $250–$650
  • Repair refrigerant leak: Depends on the kind of refrigerant your heat pump runs on. R-22 Freon is more expensive since it’s no longer being made.
  • Seal leaky ductwork: Depends on house size.

Fix Your Heat Pump Problems Quickly and Affordably with Our Help

Dealing with a malfunctioning heat pump can be annoying, but not when you get in touch with Home Comfort Heating & Air. Our professionals have been delivering the quality, affordable heat pump repair Elk River homeowners have depended on since {year}. Get in touch with us at 763-276-0617 to request your free estimate now.

Average repair costs are sourced from Fixr, which compiles estimates based on nationwide averages.