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2 year old heat pump. had constant problems with both units. Have had 3 different HVAC groups out of time to evaulate problem. Replaced compressor on small unit this past summer and thermostats on both this past winter. Have to put 12lbs of coolant in spring but no one can find a leak with snifer. What are my next steps ? affordable?

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Look for signs of oil and you will have found the leak. Compressors depend on the cool gas returning to help cool the inner motor. At 12 pounds to recharge and leak detectors that measure less than .5 Oz per year leak rate does not figure that the leak can't be found.
10% of the oil from the compressor circulates with the refrigerant. The gas leaking will dissipate but the oil at the leak point will still be evident.

Posted on May 01, 2008

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Electrical problems on HVAC systems: Keep in mind that despite the depth of technical detail you will find here about all components of air conditioners and heat pumps, most service calls for non-working air conditioners or heat pumps turn up an electrical problem. So if your A/C system is just not working at all be sure to check all of our electrical and control setting suggestions first.

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1 Answer

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1) First be sure the thermostat is set properly. Try raising the set temperature 5 degrees F. and waiting a few minutes.

2) Be sure the room-heating registers are open.

3) Check the heat pump filter. If it's dirty, change it.

4) Be sure the auxiliary heating elements are working . 

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1 Answer

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I hope you find this information to be very helpful to you. :-)

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