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This is the factory OEM replacement contactor for the Carrier PY3GNAA36060AA packaged unit. The contactor is a high-voltage relay that switches line-voltage power (240V) to the compressor and condenser fan motor using a low-voltage (24V) signal from the thermostat. When the contactor fails, the system will not respond to a cooling call — you may hear a humming or clicking at the unit with no compressor startup, or experience intermittent cooling loss due to pitted or welded contacts.
Compatibility: Engineered specifically for the Carrier PY3GNAA36060AA packaged unit. Always verify OEM part number HN51KC024 against your unit's wiring diagram or data plate before ordering. Not sure about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and ship with confidence.