OEM Carrier 2-Pole Contactor for Model C4850C50AK05061 — HN53CB115 / HN53HF122
This is the factory-specified OEM replacement contactor for the Carrier C4850C50AK05061 packaged unit. The contactor is a high-voltage relay controlled by the 24V thermostat signal — when the stat calls for cooling, the contactor closes and sends line voltage to the compressor and condenser fan motor. A failed contactor is one of the most common reasons an AC system hums at the outdoor unit but won't start, or refuses to respond to the thermostat altogether. Pitted, burned, or welded contacts are telltale signs it's time to replace.
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Specs: 2-pole configuration | 24V AC coil voltage | 30–40 amp rated contacts | Replaces OEM part numbers HN53CB115 and HN53HF122 | Direct plug-and-play fit for factory wiring harness
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OEM vs Generic: OEM contactors use silver-alloy contact tips rated to factory arc-interruption specs, significantly reducing the risk of welded contacts or premature failure under high-cycle summer loads. Generic contactors often use lower-grade contact materials that pit faster and can fail closed — a dangerous fault condition.
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Install difficulty: 2/5 — Always shut off power at both the disconnect box and the breaker before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removing the old contactor. Installation typically takes 20–30 minutes for a qualified technician.
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Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our climate-controlled warehouse.
Compatibility: Designed as a direct OEM replacement for the Carrier C4850C50AK05061 packaged unit. Cross-references OEM part numbers HN53CB115 and HN53HF122. Always verify coil voltage and pole configuration on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — contact us anytime.