OEM Carrier 2-Pole Contactor 40 Amp 24V for Model PH12NA06000GAGAA

This OEM Carrier contactor (part number HN52KD020) is the factory-specified high-voltage relay for the Carrier PH12NA06000GAGAA heat pump system. The contactor acts as the main power switch for your outdoor unit — when the thermostat calls for cooling or heating, the 24V control board energizes the contactor coil, closing the high-voltage circuit to the compressor and condenser fan motor. A failed contactor is one of the most common reasons an outdoor unit will not respond at all, hum with no startup, or intermittently lose power mid-cycle. Pitted or burned contacts from arcing are the telltale sign it's time to replace.

• Specs: 2-Pole | 40 Amp (50A resistive rated) | 24V AC coil | 50/60 Hz | Factory-matched contact gap and spring tension
• OEM vs Generic: This is a genuine Carrier OEM part — not an aftermarket substitute. Generic contactors often use lower-grade contact alloys that pit and burn faster, leading to premature failure and potential compressor damage.
• Install difficulty: 2/5 — Always disconnect power at the breaker and the disconnect box before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting the old contactor.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PH12NA06000GAGAA. Also replaces legacy part numbers HN52KD025, HN52KD025A, and 3100-30Q1028TT. Verify pole count, amperage, and coil voltage against your unit's data plate before ordering. Have a fitment question? Our HVAC parts specialists verify compatibility before you buy.