OEM Carrier 40VA Control Transformer HT01BC116 for Model PG9MAA060140AAKA

This OEM control transformer (part# HT01BC116) is the factory-specified replacement for the Carrier PG9MAA060140AAKA gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, gas valve, and all low-voltage safety circuits. When it fails — due to a shorted control wire, age, or a wiring fault — the entire control circuit goes dead: your thermostat displays nothing, the furnace will not respond to a call for heat, and no LED fault codes will appear on the board.

• Specs: 120V primary | 24V secondary | 40VA rated | Factory OEM replacement — exact form, fit, and function match for the PG9MAA060140AAKA
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier's IFC board. Undersized generic units overheat under continuous demand loads, tripping the internal thermal fuse and causing nuisance no-heat calls.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, multimeter (verify 0V before touching any terminals), wire nuts or push-in connectors. Always verify 24V output on the secondary after installation before reinstating power to the full unit.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PG9MAA060140AAKA gas furnace. Before ordering, verify your existing transformer's primary voltage (120V), secondary voltage (24V), and VA rating on the data plate or transformer label. If you have any questions about fitment, our HVAC parts specialists are available to confirm compatibility before you order — same-day shipping on all in-stock orders.