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Hannabery HVAC installs Aprilaire Humidifiers, Honeywell Programmable Thermostats and Electronic Air Cleaners HVAC Contractor in the Lehigh Valley, serving Eastern, PA Residential and Commercial Radiant Heating, Geothermal and Groundsource Heat Pumps We offer HVAC Parts, HVAC Books, trouble-shooting, heating help, and repair information
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My heat pump is iced-up, mine blows cold air. My pilot goes out. Do you know what to do?You have problems? We have answers! Hannabery HVAC

Commonly Reported HVAC Problems:
[Copyright © 1996-2010. Hannabery HVAC. All rights reserved.]

Heat pump never shuts off, runs all the time:

If you are experiencing this problem in the cooling mode during the summer, you should probably call for service. This is mostly a winter-time heating complaint.

Just like the previous complaint of the heat pump blowing cold air, sometimes the customer just thinks it runs all the time because they aren't used to a heat pump and how they work. In extremely cold weather, a properly working heat pump will run almost continuously. That is the way they were designed to work.

Now, if it isn't extremely cold and suddenly your heat pump just seems to run all the time, this indicates a problem. Along with this usually comes a high electric bill, lower supply temperatures, and sometimes icing of the outdoor unit.

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

  • Undersized equipment and/or ductwork
  • Low refrigerant charge
  • Refrigerant flow-related problem - restriction/bad metering device
  • Poor efficiency- needs cleaning and servicing
  • Bad reversing valve
  • Bad compressor valves
  • Compressor not running
  • Running in A/C mode
  • Outdoor unit iced-up because of a malfunction
  • Supplemental heat not working
  • Outdoor unit iced-up - weather related
  • Snow drift against outdoor unit
  • Outdoor unit not running
  • Thermostat set too low
  • Cold return temperatures - example: air handler in attic and the return trunk disconnected from unit, pulling in cold attic air. Unit in basement with a basement return and open windows or a flapping dog door stuck open.
  • Return duct leakage
  • Poorly insulated house, air leaks

The bottom causes in red are common problems and can be addressed by the homeowner. Try to check for these conditions first before calling for service.

Hope this helps, remember - these are just rough guidelines and not all possible situations are covered.


Hannabery HVAC is registered with the Commonwealth of Pennsylvania's Office of Attorney General: PA#8215
Phone - 610-366-9400 Toll Free - (In PA) 800-544-HEAT Fax - 610-366-9403 the company that cares
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