OEM Carrier Furnace Transformer 120V/24V 40VA for Model PG9YAA036060ABSS

This OEM Carrier control transformer (part# HT01BC117 / superseded by HT680056) is the factory-specified replacement for the Carrier PG9YAA036060ABSS gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers the control board, thermostat circuit, gas valve, and all low-voltage safety controls. When this component fails, the entire control circuit goes dark — the thermostat goes blank, the furnace refuses to fire, and no fault codes appear because the board itself has no power to display them. If your system is completely unresponsive with confirmed 120V supply voltage present, a failed transformer is one of the first components to test with a multimeter.

• Specs: 120V primary | 24V secondary | 40VA rated | Foot-mounted bracket | Cross-references: BE161840GDD, HT01BC117A, HT680056 (current supersession)
• OEM vs Generic: This is a genuine OEM factory-authorized part, matched exactly to the VA rating and mounting footprint of the original. Generic aftermarket transformers can suffer from lower VA capacity, causing nuisance trips when solenoid loads peak during ignition sequences.
• Install difficulty: 2/5 — Shut off power at the breaker and confirm zero voltage before beginning. Photograph all low-voltage wire connections before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Re-energize and verify 24V output before reassembling the cabinet.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct drop-in replacement for the Carrier PG9YAA036060ABSS gas furnace. Note that HT01BC117 has been factory-superseded by HT680056 — both part numbers are functionally identical and covered by this listing. Always verify the 120V primary / 24V secondary / 40VA rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.