Dometic™ Duo-Therm 3312301.009 OEM RV Air Conditioner Overload Protector

An overload protector is a component that will open the AC volt circuit to the compressor if the compressor overheats due to an electrical problem. Most compressors have the overload protector mounted on the exterior of the compressor casing.

To check this type of protector, turn the air conditioner circuit breaker OFF. Make sure that the overload is at ambient temperature and measure continuity across its terminals. If open, it should be replaced. A weak overload protector in the electrical system will cause the compressor to start and stop rapidly or short-cycle. This situation would be difficult to test. An exact replacement overload protector should be used whenever a replacement is required.