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This OEM contactor (part number HN52KC025) is the factory-specified high-voltage switching relay for the Carrier PH1PEA036000AABA heat pump system. The contactor acts as the main power switch for the compressor and condenser fan — when the thermostat calls for cooling or heating, the 24V control circuit energizes the coil, closing the high-voltage contacts and powering the outdoor unit. When the contactor fails, the most common symptoms are the outdoor unit not turning on, a chattering or buzzing sound from the contactor coil, visible pitting or burning on the contact faces, or a system that trips the breaker repeatedly.
Compatibility: Designed as a direct OEM replacement for the Carrier PH1PEA036000AABA heat pump. Always verify your existing contactor's pole count, coil voltage, and amperage rating against your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists are available to confirm fitment before you buy — order today and ship same day!