Hi All, and Happy [almost] New Year
I'm a home owner with a Goodman split system heat pump, that recently developed troubles. The outdoor unit is approx 12 years old, R-22, model CPKJ18-1.
The air handler fan was running constantly, but blowing ambient temp air, and that was getting steadily cooler.
* The outside unit was dead - no compressor, no fan.
* Found the main service panel breaker tripped.
* Outputs from Honeywell thermo' tested ok.
* I went outside and pulled the safety disconnect, verified no AC, and got in the electronics.
* There was 24VAC (actually a little more) between the yellow (compressor) and blue (common) low-voltage leads. (think that's pretty standard color coding?)
* Zero voltage on the fan & compressor contactor coil, but resistances seemed reasonable at 15 ohms.
* Read schematic - there is a low pressure cutout switch on the yellow before the contactor. NO voltage from LPC switch, and its resistance reads open.
* Turned breaker on, replaced safety.
* Still dead. Carefully probed contactor, have 240V at the inputs, but zero on the coil.
* Held contactor throw closed with screwdriver. Fan and compressor started, but got a whiff of "electrical burn" from the blower air out the top, and it's making irregular compressor noises. Let off after a couple seconds and haven't tried to re-start.
So I guess it really did run empty of Freon?? I had it professionally service about 14 months ago, and they had to top-off the R22. Don't have a gauge set, and that's over my head anyway, though I understand the basic refrigeration concept.
How disastrous is this? Is it typical for a compressor burn to out from it? Guess I'm trying to gauge magnitude of repair / replacement I'm in for. Not sure if I should blow $100 on a service call Monday when I should just be getting quotes for a whole new system.