Residential Plumbing & HVAC Experts

Heat Pump Blowing Warm? Learn How to Troubleshoot

If your heat pump isn’t cooling your house like it used to, there are a few things that could be going on. You could have a clogged filter, an iced up compressor, a blown fuse or even low refrigerant. The good news is that most of these problems are easy to fix.

Before you head out to check on your condenser coils, do yourself a favor and check the thermostat. You’d be surprised how many times this is the problem. Make sure that it is turned to cooling mode and that it is set to automatic (not fan on). If there is no air coming through your vents, turn on fan on mode to make sure your blower is working. If the fan is working but you are still getting warm air, skip the next step.

If your fan isn’t working, you may have blown a fuse or have an interrupted power supply. If the breaker keeps getting tripped you may have a problem in the electrical system. This is a job for the professionals.

Check your air filter. A dirty air filter can allow dirt and debris to accumulate on your condenser coils. Change your filter and use a hose to wash the outdoor compressor unit. Don’t use a power washer – the high-pressure water could damage vital components in your unit.

If you have an energy efficiency sensor on your unit (most newer units do), you may have frozen coils. If this is the case, turn your heat pump to fan only mode for about an hour to try to defrost the unit. This should get your unit blowing cold air again. If this problem returns, call an HVAC specialist to relocate the temperature sensor to an area closer to the outtake on the coils.

Low refrigerant levels are another possible cause for poor heat pump cooling. If you think you are low on refrigerant, a professional must be called to top off your unit. For more service on your San Marcos or San Diego area home heat pump, contact Sherlock Heating and Air Conditioning today.