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This OEM control transformer is the factory-specified replacement for the Carrier PH14NA02400GAAAA heat pump system. The transformer steps down line voltage (115, 208, or 230 VAC primary) to a safe 24 VAC secondary signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the system goes completely silent: the thermostat loses power, no relays close, and the unit will not respond to any calls for heating or cooling.
Compatibility: Designed for the Carrier PH14NA02400GAAAA heat pump. Verify your existing transformer's VA rating and primary voltage tap before ordering — mismatched VA ratings can overload the new transformer and void the warranty. Our team is available to confirm fitment before you order. Order today and your part ships same business day.