OEM Carrier 1-Pole Contactor 24V 30A (HN51KC024) for Model PH15NB02400GBAAA

This OEM single-pole contactor is the factory-specified replacement for the Carrier PH15NB02400GBAAA heat pump. The contactor is the high-voltage relay that receives a low-voltage (24V) signal from your thermostat and closes to send line voltage to the compressor and condenser fan motor. When it fails, the most common symptoms are an AC or heat pump that won't turn on at all, an audible chattering or humming noise from the outdoor unit, or — in the case of welded/stuck contacts — a system that runs continuously and won't shut off even when the thermostat is satisfied. Pitted or burned contacts from years of high-current switching are the #1 cause of no-cool calls in summer.

• Specs: 1-Pole (single-pole) | 24 VAC coil voltage | 30A Full Load Amps (FLA) | 150A Locked Rotor Amps (LRA) | 50/60 Hz | OEM part number HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact tolerances for the PH15NB02400GBAAA. Generic aftermarket contactors may use lighter-gauge contacts that pit and weld sooner, shortening compressor life and increasing nuisance service calls.
• Install difficulty: 2/5 — Shut off power at both the disconnect and breaker before starting. Photograph all wiring before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester. Verify 24V coil pull-in with a multimeter after install. Note: low-voltage (coil) wire positions may differ slightly between old and new unit — always follow the unit wiring diagram.
• Warranty & Shipping: 1-year OEM factory warranty against defects. Ships same business day from our warehouse. Order by 3PM local time for guaranteed same-day dispatch.

Compatibility: Direct OEM replacement for Carrier model PH15NB02400GBAAA. Also cross-references to Bryant, Payne, and Day & Night units specifying part HN51KC024. Always verify the part number on your existing contactor's label or your unit's wiring diagram before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today.