In spring 2011 I had two Goodman Model DSCZ160241 2 Stage / 2 Ton compressor units, paired with two Goodman Model AEPF183016: 2 Ton variable speed indoor air handlers installed in my home (2,000 sqft townhouse). Electric heat pumps.
I am constantly getting ‘Compressor Locked Rotor’ codes on the compressor units. However, even when the units are working, I’m not getting anything that feels like warm air out of the registers (unless the aux heat kicks in, which is does constantly, even at mild temperatures). I’m getting some heat differential out of them, but to the skin it feels like wind-chill, not heat. That doesn’t seem right to me.
My question is (when the compressors are actually working) are the following performance numbers normal for a system like this?
Outside Air Temp: 45 degrees
Inside Air Temp (intake): 72
Air Temp at register: 81
Insulated Line Temp: 88
Outside Air Temp: 37
Inside Air Temp: 72
Air Temp at Register: 77
Insulated Line Temp: 85
The units have been trouble since installation, but the installer kept insisting they were working as intended or it was just the insulation in my house. Finally when a $650 electric bill rolled in, I climbed up on the roof and found out that both of my units were actually coding 'compressor locked rotor' and the compressors were completely nonfunctional, and I was working off of 100% aux heat.
That began a dozen trips from the installer to tweak the charge or tell me to just turn the breaker on and off to reset the system when the compressors locked up. My electric bills continued to be just as high as they were when I had two 25 year old units ($600-$700/mo Nov-Feb). My systems never turn off and even when it’s 55 degrees outside, I’m only getting heat when it (frequently) switches to auxiliary heat.
I finally had a third party come in and do a wire-by-wire review of the install and they found all sorts of things wrong with it: the thermal expansion valves installed on the system were incorrect (for a system twice its size), the system was wired as a 1 stage, the air handler speed was way too high and the thermostats were programmed for a different kind of system and the 'drier filters' were installed on the outside instead of the inside. I had everything confirmed by the Goodman regional tech who came out and worked with the third party I hired.
The goodman tech & the third party fixed everything except the thermal expansion valve and the drier filters. The installer came out and fixed those last two items.
Unfortunately, the compressor locked rotors are back on one of my units and I'm getting the performance numbers listed above on the one system that is working (air is cold to the skin, insulated pipe is luke-warm/cool to touch).