Thread: Central AC not working walk through

Good points gents..
Also figured I might as well add that if everything checks out, and your contact works too, to check the compressor itself use your meter, on resistance setting to check the three leads going to the compressor itself.
With all three disconnected from the circuit you should have 3 different ohm readings between the wires.
Ie, between 1&2 you get 1.5 ohms
2&3 you get 2 ohms
1&3 you get 3.5 ohms, means it’s a good compressor.
So the total on one leg should equal, about, the sum of the other two legs,, rule of thumb. Anything open or far off these numbers means bad windings in the compressor after all.. at that point call a specialist..
Cheers.