OEM Carrier Control Transformer 40VA 120V/24V for Model PG8MAA036070AAJA

This OEM control transformer (part# HT01BC116) is the factory-specified replacement for the Carrier PG8MAA036070AAJA gas furnace. The transformer steps down line voltage from 120V to the 24V AC signal required to power the control board, thermostat, gas valve, and all low-voltage components in the system. When this transformer fails, the entire control circuit goes dead — the thermostat shows no response, the furnace won't initiate a call for heat, and no safety sequences can run. A failed transformer is often the first thing to check when a furnace appears completely unresponsive.

• Specs: 40VA rating | 120V primary input | 24V AC secondary output | Direct OEM replacement for part# HT01BC116 | Factory-matched construction and terminal configuration
• OEM vs Generic: This OEM unit is wound to Carrier's exact VA rating and insulation class, ensuring the 24V control circuit holds voltage under full load. Undersized generic transformers can sag under load, causing erratic board behavior, nuisance lockouts, and premature component failure.
• Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Always photograph or label wiring connections before removal.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct drop-in fit for the Carrier PG8MAA036070AAJA gas furnace. Confirm your existing transformer's VA rating and voltage markings on the unit data plate before ordering. Our parts specialists are available to verify fitment — order with confidence today and get your system back online fast.