OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG8JAA036070ABJA (HT01BC116)

This OEM control transformer is the factory-specified replacement for the Carrier PG8JAA036070ABJA gas furnace. It steps down 120V line voltage to the 24V signal used by your thermostat, control board, gas valve, and all low-voltage controls. When the transformer fails, the entire control circuit goes dead — you'll see a blank thermostat, no ignition attempt, and no response from the furnace whatsoever. Replacing it restores full low-voltage function and is one of the most reliable, cost-effective repairs in HVAC service.

• Specs: Primary Input: 120VAC | Secondary Output: 24VAC | VA Rating: 40VA | Frequency: 60Hz | Connection Type: Wire Leads | Mounting: Foot-mount | OEM Part Number: HT01BC116 (superseded by HT680054)
• OEM vs Generic: OEM transformers are wound and tested to exact factory VA and voltage tolerances. Generic units often run outside rated VA, causing nuisance tripped fuses, control board faults, and premature failure of downstream components like gas valves and contactors.
• Install Difficulty: 2/5 — Straightforward replacement for any experienced DIYer or technician. Turn off the furnace disconnect and 24V fuse before proceeding. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wire connections before disconnecting. Verify 24VAC output with a multimeter after installation.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG8JAA036070ABJA gas furnace. Also cross-references HT680054, HT01BC115, HT01BC120. Always confirm input voltage and VA rating on your unit's data plate before ordering. Our HVAC parts specialists are available to verify fitment — contact us before you buy if you have any questions.