Your heat pump is an crucial part of your home because it delivers year-round comfort. But, like any home comfort system, it’s certain to have some issues every now and then.

Let’s go over these troubles and how much they might cost to repair, so you’ll have some idea before you call an HVAC technician. Some of the most typical 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 Isn’t Turning On

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

Here’s what to check:

  • Is your thermostat on the correct setting? If you want cooling, make sure it’s set to “cool,” “auto” and that your setting is lower than the ambient temperature. If you want heat, it should be set to “heat,” “auto” and your setting should be greater than the current temperature. If you use 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 doesn’t have power. Reset the matching breaker if it’s facing the outside of the electrical panel.
  • Is the air filter blocked? A dirty air filter is troublesome 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 problem, you’ll need to contact a heating and cooling company like AC Sales.

Estimated Repair Cost

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

2. Heat Pump Stays On Constantly

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

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

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

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

Estimated Repair Cost

This can be linked to many issues, so your heat pump repair cost will depend on the problem and how complex it is.

3. Heat Pump Isn’t Defrosting

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

Here are several reasons why this might be taking place:

  • Your heat pump doesn’t have enough airflow because it’s obstructed by snow, bushes or yard waste.
  • 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 noises. Or if you notice a sweet, formaldehyde-like odor around the outdoor unit.

Estimated Repair Cost

Like we talked about 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 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 pricier since it’s no longer being made.

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 associated to many issues. We recommend checking for:

  • Ideal thermostat settings
  • Tripped circuit breakers
  • A dirty air filter
  • Ice on your heat pump

If there’s nothing awry with your thermostat, circuit breakers or air filter, you’ll need assistance 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 an issue with its reversing valve, outdoor fan motor or a refrigerant leak.

Estimated Repair Costs

These repair costs are estimates. Your total expense may vary based on your heat pump brand, model and the severity 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 pricier since it’s no longer being manufactured.
  • Seal leaky ductwork: Depends on house size.

5. Heat Pump Isn’t Starting After Changing Thermostat

If your heat pump won’t turn on after switching the thermostat, the problem is probably connected to your new thermostat. While you can use just about any thermostat with a furnace, the same isn’t true for heat pumps, especially if you have 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 running 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 wise to have a heating and cooling pro recommend a thermostat and expertly install it. That way, you’ll avoid any compatibility or wiring issues.

Estimated Repair Costs

The cost of professional thermostat installation depends considerably on what kind of thermostat you want. While programmable thermostats are less expensive, they are missing the sophisticated features and convenience of a smart thermostat.

6. Heat Pump Can’t Work in Heating Mode

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

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

An icy heat pump or leaky ductwork will require the assistance of an HVAC technician. Ductwork is tricky to reach since it’s located behind walls and numerous issues can cause your heat pump to freeze up.

Estimated Repair Costs

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

  • 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 pricier since it’s no longer being made.
  • Seal leaky ductwork: Depends on house size.

Resolve Any Heat Pump Problems Right Away with Help from Local Experts

Dealing with a malfunctioning heat pump can be frustrating, but not when you get in touch with AC Sales. Our experts have been providing the quality, affordable heat pump repair Lafayette homeowners have depended on since . Call us at (337) 234-2345 to get your free estimate now.

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