"H. R. Bob Hofmann" wrote in message
om...

| Maybe it is a sensor to shut the airconditioner down in case the
| temperature gets too cold and there is danger of too much frost/ice on
| the cooling coils, or maybe a shutoff if the compressor temperature
| gets too high. You don't say where this sensor is located, as far as
| I can tell.

From "clips onto the cold end return" I assume it's on the input to the
compressor.

N