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My Heat Pump Blows Cold Air

It might seem like your heat pump blows cold air because air temperatures from heat pumps (85-98 degrees) are much lower than the temperatures from gas/oil-fired systems (85-98). Because your body temperature is 98.6, it might feel cold, but 85-98 degree air is what you should expect from your heat pump.

There are actually two possible explanations for this observation.

  1. You think your heat pump is blowing cold air.

  2. Your heat pump really is blowing cold air.

The aforementioned misperception usually only happens to new heat pump owners. To determine which of the possibilities above is going on, try measuring the air temperature at the supply and return register. If there is no difference between the two, then there is a problem.

Heat Pump Blowing Cold Air Instead of Heat

If the heat pump really is blowing cold air, not putting out any warm air at all there could be several things wrong.

Below is a list of possible causes. Items in blue can be addressed or fixed by the homeowner. Those in red usually require a service call.

  • Snow drift leaves against outdoor unit

  • Outdoor unit iced up-weather related

  • Return duct leakage

  • Cold return temperatures i.e., air handler in attic/crawl space disconnected from pulling in cold air

  • Thermostat set below 65 degrees

  • Low refrigerant charge

  • Refrigerant flow related problem

  • Restriction/defective metering device

  • Poor efficiency-needs cleaning & servicing

  • Defective reversing valve

  • Defective compressor valves

  • Compressor not running

  • Running in A/C mode

  • Outdoor unit iced up because of a malfunction

Hope this has been of some assistance, however they are just rough guidelines and not all-possible conditions are covered.


The company You Choose To Install and Service Your System Will Determine The Degree of Comfort and Satisfaction You Enjoy.

Excerpts of the preceding information have been compiled by Hannabery HVAC, which has graciously permitted us to include them on this web site as a service for all homeowners.

These "Common HVAC Problems" are provided FREE and as a consequence Climatemakers does not assume any liability resulting from any information we provide. In all cases where there is any possibility of injury, consequential damage, direct damage to your equipment or when recommended by the equipment manufacturer, your system should be repaired, inspected or maintained by a qualified technician.

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If you find an error on this page I would appreciate it if you would email us or call (757) 600-0422.

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