OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8UAA048111ADJA

This is the factory OEM replacement control transformer for the Carrier PG8UAA048111ADJA gas furnace. The transformer steps down line voltage from 120V to 24VAC to power the low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When this transformer fails, the entire control circuit goes dead: the thermostat loses power, no calls for heat or cool are processed, and the system will not respond at all. A blown secondary fuse or repeated fuse failures are classic indicators of transformer failure or an overloaded control circuit.

• Specs: 120V primary → 24VAC secondary | 40VA rated | OEM part number HT01BC116 | Factory-matched for Carrier PG8UAA048111ADJA
• OEM vs Generic: This OEM transformer is wound to exact factory VA and voltage specifications. Generic transformers often run at reduced VA capacity, causing premature overload tripping and shortened service life under normal furnace cycling loads.
• Install difficulty: 2/5 — Disconnect power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24VAC output after install). Always inspect low-voltage wiring for shorts before replacing — a shorted wire will blow the new transformer immediately.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as a direct OEM replacement for Carrier model PG8UAA048111ADJA. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate prior to ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy.