my heat pump is going off on high head at defrost

[elder rodriguez]

my heat pump is going off on high head at defrost

[HVACdocAZ]

1st make sure your air filter is clean...dirty filter causes a air flow restriction which results with high pressure failure.

Thats the easy fix if you are lucky!

however if that doent work thier are a number of refrigerant issues that can cause it. You will probley need to get a qualified tech out to your home. Make sure you let the company you call know you may have a possible restriction in your heat pump....this way they know to send out a more experienced tech

good luck

[wildguy2]

My heat pump unit had been doin this in the past...building up to much pressure and shutting down...till it finally shut down permantly...after having it checked over..found it was a faulty TX valve on the unit..was stuck closed not allowing the gas to cycle through the system..building up pressure till it shut down the whole thing, which is a good thing cause it kept from destroying the compressor....not 100% sure in your system but certainly does sound like the same problem.