This is a BRAND NEW 24 volt Double (2) Pole Contactor. Mars part # is 17321. It fits 99% of the residential Air Conditioners/Heat pumps on the market. Thanks for looking and good luck!
A contactor form of a relay. Relays are switches that open and close circuits electrically. In most HVAC equipment a low voltage coil relay (24 vac) is energized in order to open or close a higher voltage (usually 120-240) circuit.
Replaces Old Part #s:
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