OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
This OEM replacement contactor is the factory-specified part for Carrier C50A505061 packaged rooftop and split-system units. The contactor is a high-voltage relay controlled by your thermostat's 24V signal — when the call for cooling comes in, the contactor closes its contacts to send line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common causes of an air conditioning system that powers on but won't cool, or one that simply refuses to start. Symptoms include chattering or buzzing at the contactor, pitted or burned contacts, or a unit that runs constantly without cycling off. Replaces OEM part numbers HN53CB115, HN53CD115, and HN53HF122.
Compatibility: Designed for Carrier model C50A505061 commercial packaged rooftop units. Cross-references OEM part numbers HN53CB115, HN53CD115, and HN53HF122 — all three are direct replacements for this contactor position. Always verify coil voltage and pole configuration against your unit's wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get your system back online today.