OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8JAA048070ADJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8JAA048070ADJA gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers the entire control circuit — including the thermostat, control board, gas valve, and zone controls. When the transformer fails, the system goes completely unresponsive: the thermostat goes dark, the furnace won't initiate a heat call, and no fault codes can be read. Replacing it with the correct OEM unit (part number HT01BC116) restores the full 24V control circuit to factory specification.

• Specs: 120V primary input | 24V secondary output | 40VA rating | Factory-matched winding tolerance for stable voltage under full control-circuit load
• OEM vs Generic: OEM transformers are wound and tested to Carrier's exact VA and voltage-regulation standards. Generic units frequently sag under load, causing intermittent lockouts, nuisance board resets, and premature control-board failure — making the OEM unit the only recommended choice for long-term reliability.
• Install difficulty: 2/5 — Disconnect power at the breaker and confirm zero voltage with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wire connections before removing the old transformer; most units have color-coded leads that reinstall quickly.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cut-off.

Compatibility: Engineered for the Carrier PG8JAA048070ADJA packaged gas furnace. Always verify your unit's data plate lists a 40VA, 120V/24V transformer before ordering. Our team is available to confirm fitment — reach out before you buy if you have any questions, and we'll verify compatibility for you.