Description
This is a BRAND NEW Mars 2 Pole Contactor Relay rated at 40 amps and with a 24 volt coil. Part # is 91421 (also 3100Y20Q1800CL) It fits 99% of all Air Conditioners/Heat pumps produced. Thanks for looking and good luck!
Function:
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:
91421 3100Y20Q1800CL
Repair Difficulty Level:
Partial List of Units that Use This Item:
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