OEM Carrier 1-Pole Contactor 24V 25A — HN51KB024 for Model PH10JA03000GAEAA

This is the genuine OEM replacement contactor for the Carrier PH10JA03000GAEAA heat pump/air conditioning system. The contactor is the high-voltage relay that closes the circuit to the compressor and condenser fan motor every time your thermostat calls for cooling or heating. When it fails, the most common symptoms are an AC unit that won't turn on at all, compressor that won't start despite the thermostat calling, audible chattering or buzzing at the contactor, or a system that trips the breaker repeatedly. Replacing a worn contactor is one of the most cost-effective HVAC repairs available.

• Specs: 1-Pole | 24V 50/60Hz coil voltage | 25 FLA (Full Load Amps) | 150 LRA (Locked Rotor Amps) | Factory-matched OEM tolerances | Part Number: HN51KB024
• OEM vs Generic: This is a genuine Carrier OEM contactor — not an aftermarket substitute. OEM contactors are built to factory contact gap, coil pull-in voltage, and arc suppression specs. Generic contactors may chatter at low voltage or fail prematurely under high cycling loads.
• Install Difficulty: 2/5 — Turn off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Always photograph all wire connections before removing the old contactor. Snap-in terminal replacement typically takes 15–30 minutes.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed as the factory-specified contactor for Carrier model PH10JA03000GAEAA. Verify your unit's data plate and existing contactor pole count and coil voltage before ordering. Our fitment team is available to confirm compatibility — just reach out before you order. Order today and get same-day shipping.