OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
This is the OEM factory-authorized replacement control transformer for the Carrier PH13PR04800GAEAA packaged heat pump unit. Part number HT01AW229 is a foot-mounted 60VA transformer that steps down the high-voltage primary supply (115V, 208V, or 230V) to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, reversing valve, and control board. When this transformer fails, the result is total loss of 24V control voltage: the thermostat goes blank, the system won't respond to any calls for heating or cooling, and no low-voltage components will operate. A failed transformer can also trip a downstream fuse repeatedly or show 0V on a multimeter at the 24V secondary terminals.
Compatibility: Direct OEM replacement for Carrier PH13PR04800GAEAA packaged heat pump units. Verify your unit's data plate lists the HT01AW229 or confirm primary voltage matches your supply voltage before ordering. Our HVAC parts specialists are available to verify fitment — just reach out before you order. In stock and ready to ship today.