OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8MAA024070AAJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8MAA024070AAJA gas furnace. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including the thermostat, gas valve, inducer, and control board. When it fails, the entire control system goes dark: the thermostat loses power, the furnace will not respond to a heat call, and in some cases the system will blow a 3A control fuse repeatedly if a secondary short is present.

• Specs: Input 120V AC | Output 24V AC | 40VA rated | OEM part number HT01BC116 | Factory-matched windings and mounting footprint for drop-in replacement
• OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic transformers often run under-rated on VA capacity, causing thermal overload, nuisance fuse failures, and premature control board damage.
• Install Difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before handling. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all wires before disconnecting the old transformer. Check and replace the 3A control fuse if blown.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PG8MAA024070AAJA 80% AFUE gas furnace. Always verify your existing transformer's input/output voltage and VA rating against your unit's data plate before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy — reach out before placing your order.