OEM Carrier Contactor 24V Coil 2-Pole for Model PH10JA018000AGAA

This is the factory-specified OEM replacement contactor for the Carrier PH10JA018000AGAA heat pump system. The contactor is the high-voltage relay that physically closes the circuit between the line voltage power supply and your compressor and condenser fan motor every time the thermostat calls for cooling or heating. When the contactor fails, the most common symptoms are an AC or heat pump that simply will not turn on, a buzzing or chattering noise from the outdoor unit, or burned/pitted contact points visible on inspection. Replacing a worn contactor promptly protects your compressor — the most expensive component in the system — from the voltage irregularities caused by a failing switch.

• Specs: OEM Part No. HN51KC024 | 2-Pole configuration | 24V control coil | Factory-matched contact rating for Carrier PH10JA018000AGAA — verify amperage on your unit's data plate
• OEM vs Generic: This OEM contactor uses factory-spec contact material and coil windings that match exact pull-in and drop-out voltages. Generic contactors may use inferior contact alloys that pit faster under load, causing repeat failures within one season.
• Install Difficulty: 3/5 — LINE VOLTAGE IS PRESENT in the outdoor disconnect and unit. Always shut off the outdoor disconnect AND the breaker before beginning work. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, camera/phone to photograph wiring before removal. Wire-for-wire replacement is straightforward once power is confirmed off.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for Carrier model PH10JA018000AGAA. Always cross-reference the part number on your existing contactor's label and confirm coil voltage and pole count before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.