OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8UAA048091ACJA

This OEM control transformer (part# HT01BC116) is the factory-specified replacement for the Carrier PG8UAA048091ACJA gas furnace. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, control board, gas valve, and ignition sequence. When this part fails, the furnace will appear completely unresponsive: no display, no call-for-heat reaction, and no ignition attempt whatsoever. A failed transformer is one of the most commonly misdiagnosed furnace faults, often mistaken for a bad control board.

• Specs: Input 120V AC | Output 24V AC | 40VA rating | Factory-matched OEM design | Spade or wire-lead termination per factory configuration
• OEM vs Generic: OEM transformers from Carrier are wound to exact VA tolerances, protecting downstream components like the gas valve and IFC board from voltage fluctuations. Generic alternatives may be under-rated, causing nuisance resets or premature board failure.
• Install Difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output post-install). Note wire polarity and lead positions before removing the old unit.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered for the Carrier PG8UAA048091ACJA gas furnace. Always verify your existing transformer's input/output voltage and VA rating against your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.