OEM Carrier 40VA Control Circuit Transformer for Model PG9MAB036060AASA

This OEM control transformer (part number HT01BC116) is the factory-specified replacement for the Carrier PG9MAB036060AASA gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, gas valve, control board, and safety switches. When this transformer fails, the furnace goes completely silent: the thermostat gets no response, no call for heat is processed, and nothing in the system energizes. A failed transformer is often misdiagnosed as a bad control board, so always test here first with a multimeter.

• Specs: Input: 120V AC | Output: 24V AC | 40VA rating | Factory OEM part number HT01BC116 | Direct plug-in or wire-lead termination to match OEM configuration
• OEM vs Generic: This is a genuine OEM Carrier transformer engineered to exact 40VA output tolerances for the PG9MAB036060AASA. Generic transformers frequently run undersized VA ratings, causing nuisance low-voltage dropouts, tripped fuses, and premature control board failure.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Photograph all wiring before disconnecting. Verify 24V output with a multimeter after installation before restoring full power.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG9MAB036060AASA 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 — reach out before you buy if you have any questions. Order now and ship today!