OEM Carrier 1-Pole Contactor 24V 25A — HN51KB024 for Model PH1PNA030000ABBA

This is the genuine OEM replacement contactor for the Carrier PH1PNA030000ABBA heat pump system. The contactor is the high-voltage switching relay that receives a 24V signal from the thermostat or control board and closes the high-voltage circuit to power the compressor and condenser fan motor. When a contactor fails, the result is typically a system that won't energize at all — the thermostat calls for cooling or heating but nothing happens at the outdoor unit, or the unit may short-cycle or hum without starting.

• Specs: 1-Pole configuration | 24V 50/60Hz coil | 25 FLA (Full Load Amps) | 30 RES rated | OEM part number HN51KB024 — factory-matched for Carrier PH1PNA030000ABBA
• OEM vs Generic: This is a genuine Carrier OEM contactor built to exact factory specifications. Generic aftermarket contactors often use lighter-gauge contacts that pit and arc faster under load, leading to premature failure and potential compressor damage. OEM ensures the correct coil pull-in voltage and contact rating every time.
• Install difficulty: 2/5 — Always disconnect power at the disconnect box and wait 5 minutes before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Swap wires one at a time to avoid miswiring.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Designed as the factory-specified contactor for Carrier model PH1PNA030000ABBA. Always verify your existing contactor's pole count, coil voltage, and amp rating against your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy if you have any questions.