OEM Carrier Single-Pole Contactor 1-Pole 30A 24V Coil — HN51KC024 for Model PH11JA048000AAAA

This is the factory OEM replacement contactor for the Carrier PH11JA048000AAAA heat pump. The contactor is the high-voltage relay that receives a 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 the outdoor unit refusing to start, the AC humming but not cooling, or the contacts welding shut — causing the unit to run continuously even when the thermostat is satisfied. Burned or pitted contacts are the leading cause of compressor failure in residential HVAC systems, making timely contactor replacement one of the most important preventive maintenance steps you can take.

• Specs: 1-Pole (single-pole) | 30A FLA / 150A LRA | 24 VAC coil voltage | 50/60 Hz | OEM Part Number HN51KC024
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact contact-gap tolerances and coil-pull specifications. Generic contactors often use lower-grade silver-alloy contacts that pit faster under high-cycle residential loads, risking compressor damage.
• Install difficulty: 2/5 — Shut off power at both the disconnect and breaker before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring before removing any terminals. Verify 24V coil pull-in after installation before closing the access panel.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Factory-specified OEM contactor for the Carrier PH11JA048000AAAA heat pump. Verify your unit's data plate and parts list to confirm HN51KC024 is the correct contactor before ordering. Our fitment team is standing by if you have any questions — we verify the part before you buy.