OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8MAA036070ABJA

This OEM step-down transformer is the factory-specified replacement for the Carrier PG8MAA036070ABJA gas furnace. It converts 120V line voltage to the 24V AC signal that powers your thermostat, control board, gas valve, and all low-voltage control circuit components. When this transformer fails, the entire control circuit goes dark — the thermostat shows no response, the furnace won't call for heat, and no fault codes are generated because the board itself has no power.

• Specs: Input: 120V AC | Output: 24V AC | VA Rating: 40VA | Class 2 transformer | Factory-matched OEM replacement for part number HT01BC116
• OEM vs Generic: OEM transformers are wound to exact factory VA and voltage tolerances, protecting sensitive control boards from undervoltage or overcurrent conditions. Generic units with loose tolerances can damage boards over time.
• Install Difficulty: 2/5 — Shut off power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Note existing wire connections (photograph first), disconnect, swap, and restore. Verify 24V output at secondary terminals before buttoning up.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Designed and factory-matched for the Carrier PG8MAA036070ABJA 80% AFUE gas furnace. Always verify your unit's wiring diagram and VA draw of connected devices does not exceed 40VA before installing. Our fitment team is available to confirm compatibility before you order — in stock and ships today.