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This is the OEM factory-specified contactor (part number HN51KB024) for the Carrier PY3PNA030060AA split-system unit. The contactor is the high-voltage relay that bridges your 24V thermostat signal to the 240V power supply feeding the compressor and condenser fan. When it fails, the most common symptom is an AC system that simply won't turn on — the thermostat calls for cooling, but nothing happens. In some cases a stuck-closed contactor causes the outdoor unit to run continuously even when the thermostat is satisfied.
Compatibility: Designed and factory-specified for Carrier model PY3PNA030060AA. Always verify your existing contactor's pole count, coil voltage, and amp rating against your unit's data plate before ordering. Our team is available to confirm fitment — just reach out before you buy. Order today and get same-day shipping!