What about your other sensor? Do you have power at it? One thing to check..... Take a jumper wire from hot side of batt. Hook on to compressor to make it kick in manually, have gauges hooked up and make sure pressures are normal.....if so check your other sensors some systems have two some three. The sensors are in a series type circuit so If ones bad it will still have power but power won't come out the other side to the next sensor. HOPE this is correct or helpful