OEM Carrier Control Transformer 40VA 120V to 24V for Model PG8MAA024070ACJA

This OEM Carrier transformer (part #HT01BC116) is the factory-specified replacement for the Carrier PG8MAA024070ACJA gas furnace. The transformer steps line voltage (120V) down to the 24V signal voltage required by the thermostat, control board, gas valve, and all low-voltage control circuitry. When the transformer fails, the entire control circuit loses power — the thermostat goes blank, the furnace won't respond to any call for heat or cooling, and no diagnostic fault codes will even appear. A blown fuse on the secondary side is often the first sign of transformer trouble.

• Specs: 40VA rating | Primary: 120VAC | Secondary: 24VAC | OEM part number HT01BC116 | Factory-matched output for stable 24V control circuits
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the Carrier control board. Undersized or off-spec generic units can cause nuisance tripping, blown fuses, and premature control board failure.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always verify 0V at the primary leads before handling. Label all wiring connections before removal.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8MAA024070ACJA 80% AFUE packaged gas furnace. Verify your unit's data plate and existing transformer VA/voltage rating before ordering to confirm a direct match. Our fitment team is available to verify compatibility before you buy — same-day shipping on all in-stock orders.