OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8MAA048135ACJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8MAA048135ACJA gas furnace. The transformer steps down 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, gas valve, contactor, and control board. When it fails, the entire system goes silent: the thermostat loses power, no heat call is ever generated, and nothing in the furnace responds. A failed transformer is often mistaken for a bad thermostat or control board, making correct diagnosis critical before replacement.

• Specs: 120V primary | 24V secondary | 40VA rating | Factory-matched OEM construction | Spade or wire-lead termination as factory configured
• OEM vs Generic: The OEM HT01BC116 is wound and rated to exact Carrier factory specifications, ensuring stable 24V output under full control-circuit load. Generic units may undervolt under load, causing intermittent lockouts and erratic thermostat behavior.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always photograph and label existing wiring before disconnecting the old transformer.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PG8MAA048135ACJA packaged gas furnace/air handler. Verify primary and secondary voltage ratings on your existing transformer's label before ordering to confirm fitment. Our HVAC parts specialists are available to confirm compatibility before you buy — no guesswork required.