Order before 3PM CST — ships same day.
Standard delivery 2-5 business days. Express options at checkout.
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
This is the factory-authorized OEM replacement control transformer for the Carrier PH13NR04800GAAAA heat pump system. Part number HT01AW229, this 60VA transformer steps down the 115/208/230V line voltage to the 24V AC signal that powers your thermostat, contactor coil, and all low-voltage control circuitry. When this transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system refuses to respond to any commands, and you may measure zero voltage on the 24V secondary terminals. Replacing it with the correct OEM unit restores full system operation immediately.
Compatibility: Engineered as the OEM direct replacement for Carrier model PH13NR04800GAAAA. The multi-tap 115/208/230V primary makes this transformer compatible across a range of supply voltages — always confirm your unit's data plate voltage before wiring. Cross-references: HT01AW229A, CIN-TRAN, 30-BV2006, 30-1814A. Questions about fitment? Our HVAC parts specialists verify compatibility before you order.