OEM Carrier Single-Pole Contactor 30A 24V Coil — HN51KC024 for Model PH13NB018000AAAA

This is the genuine OEM replacement contactor for the Carrier PH13NB018000AAAA heat pump system. The contactor is the high-voltage relay that receives a 24V signal from your thermostat and closes the circuit to power the compressor and/or condenser fan motor. When it fails — due to pitted contacts, a welded switch, or a burned coil — your outdoor unit will appear completely dead even while the thermostat is calling for cooling or heating. Symptoms include the outdoor unit not starting, audible humming with no compressor engagement, or the system running constantly without shutting off (welded contacts).

• Specs: 1-Pole | 30A FLA / 150A LRA | 24 VAC coil voltage | 50/60 Hz | OEM Part# HN51KC024
• OEM vs Generic: This Factory Authorized Part is engineered to meet exact Carrier specifications for the PH13NB018000AAAA, ensuring precise coil pull-in voltage, contact rating, and terminal placement. Generic contactors may vary in contact gap and coil sensitivity, leading to premature failure or nuisance lockouts.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before proceeding. Photograph all wiring connections before removing the old contactor. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 24V coil signal at thermostat call before condemning the contactor.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for Carrier model PH13NB018000AAAA. Verify part number against your unit's wiring diagram or data plate before ordering. Cross-references include HN51CC024, P282-1304, P282-1305, and P282-0311. Our fitment team is available to confirm compatibility before you buy — order today and get your system back online fast.