I just replaced my compressor triac Wednesday. In my case however, the AC circuit breaker would turn off the pump. The AC would run fine, but when the thermostat reached its set point, the blower would spool down to low, but the compressor and water pump would continue to run. The ONLY way to shut them off was to turn the AC units circuit breaker off. The compressor triac for my Cruisair was located in the wall mounted electrical box next to the circuit board. The triac looked like this: It had a black wire, a yellow wire and a purple wire running to it. $42.00 from Lamy Marine in Chesapeake, VA.