First post, and I hope this is in the right forum. My upstairs unit starting getting picky on me lately. Lately it will blow cold sometimes, and hot others.
I'll turn the thermostat down, and the thermostat will click on. The blower fan comes on, the compressor fan comes on, but the compressor won't. So i'll turn it off, and turn it right back on, and it will immediatly start blowing cold. I don't think it's a matter of the compressor overheating, cause usually the compressor hasn't run for a few hours. Then when I turn the thermostat down it gets finicky. It comes on just fine about 9 out of 10 times. But every once in a while, it's nothing but hot air, and turning the thermostat off and back on usually fixes it.
So what could be the issue? Is it a faulty capacitor, wiring, or pressure switch?