Nordyne heatpump defrost problem
Posted: Tue Dec 07, 2010 7:15 pm
Hi,
I was wondering if someone here might be able to give me some repair information for my mom's Nordyne heat pump. Last summer it was blowing fuses in the air handler inside. I tracked the short down to the defrost board in the compressor unit. I replaced it and all was well during the cooling season. Now the outside unit keeps freezing up and it doesn't seem to be entering the defrost cycle. I did the test that came with the new board and it will enter the test defrost cycle and work fine. One part of the test jumpers the defrost t-stat and the cycle starts. This was two weeks ago.
My question is if the board checks out what are the other possible problems.
Is the defrost t-stat bad?
What actually triggers the defrost cycle in the logic board? Is it the number of compressor hours?
I live out of town and my brother called me this afternoon my brother called and said that the coil was frozen up worse than ever.
Any ideas?
Thanks in advance
I was wondering if someone here might be able to give me some repair information for my mom's Nordyne heat pump. Last summer it was blowing fuses in the air handler inside. I tracked the short down to the defrost board in the compressor unit. I replaced it and all was well during the cooling season. Now the outside unit keeps freezing up and it doesn't seem to be entering the defrost cycle. I did the test that came with the new board and it will enter the test defrost cycle and work fine. One part of the test jumpers the defrost t-stat and the cycle starts. This was two weeks ago.
My question is if the board checks out what are the other possible problems.
Is the defrost t-stat bad?
What actually triggers the defrost cycle in the logic board? Is it the number of compressor hours?
I live out of town and my brother called me this afternoon my brother called and said that the coil was frozen up worse than ever.
Any ideas?
Thanks in advance