Quote:
Originally Posted by KC Kings
This is partly incorrect. There are two voltages going to the compressor, 200 volts which is always connected, and pulling the block will disconnect the 200.
There is also a 24 volt coming from inside the house. When your blower turns on inside the house, it sends 24 out to the compressor to trip a relay that closes the circuit on the 200 and turns on the compressor
If your inside fan comes on but the outside compressor doesn't turn on, more than likely it is the contacts on your relay. This is VERY common problem during the beginning of the AC season, and the relay cost $20. If you are electrical saavy, you can take off the cover, check the bottom poles with a meter and you should get 200. With the AC running inside you should also get 200 across the top poles, but if your relay is bad you will get 0 volts or close to it.
If you are in KC and want this done by a pro that won't bend you over, send me a PM.
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KC Kings\Dan
I assume the reverse is true that a defaulty relay would keep the compressor from shutting off when the fan shuts off or could it be further up the line? I replaced the relay last year because the compressor wasn't kicking on.