OEM Carrier 40VA Control Transformer 120V–24V for Model PG9MAA036060AEKA

This OEM control transformer (part number HT01BC116, superseded by HT680054) is the factory-specified replacement for the Carrier PG9MAA036060AEKA gas furnace. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, gas valve, ignition board, and zone controls. When this transformer fails, the furnace goes completely silent: no ignition attempt, no inducer startup, and the thermostat display may go dark. A failed transformer is often misdiagnosed as a bad control board, making it the smart first component to test.

• Specs: 120V AC primary | 24V AC secondary | 40 VA rating | 60 Hz | Foot-mount configuration | Wire-lead connections with pre-installed insulated female connectors
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the Carrier PG9MAA036060AEKA control circuit. Generic units often run off-voltage, causing nuisance lockouts, erratic thermostat behavior, or premature control board failure.
• Install difficulty: 2/5 — Always shut off power at the breaker and gas supply before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph and label all wire connections before disconnecting the old unit. Test output voltage (should read ~24–28V AC) after installation before restoring gas.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for the Carrier PG9MAA036060AEKA gas furnace. Also cross-references part numbers HT680054, HT01BC115, HT01BB126, HT01BC120, and HT01AW115. Verify your existing transformer's VA rating and input/output voltage on the data plate before ordering. Our fitment team is available to confirm compatibility — just reach out before you buy.