OEM Carrier Furnace Transformer 40VA 120V to 24V — Model UPFLOW200FAU14B

The Carrier HT01CN001 is the factory-specified OEM control transformer for the Carrier UPFLOW200FAU14B upflow gas furnace. This transformer steps down 120V line voltage to a 12/24V secondary output at 40VA, powering the low-voltage control circuit that operates the thermostat, gas valve, inducer relay, and all other 24V control components. When this transformer fails — typically due to an electrical surge, short circuit in the control wiring, or normal wear — the entire control circuit goes dead. Symptoms include a completely unresponsive thermostat, a furnace that won't activate on command, or a burning smell accompanied by buzzing near the transformer itself. Replacing it promptly with the correct OEM unit restores full system operation.

• Specs: 40VA capacity | 120V primary | 12V & 24V secondary | Factory part number HT01CN001 | Replaces legacy part numbers HT01BJ115, 19EA41612, 19EA42612
• OEM vs Generic: This is a genuine Carrier factory-authorized replacement transformer. OEM units are wound to exact VA and voltage tolerances for the UPFLOW200FAU14B control board. Aftermarket transformers with loose tolerances can under-deliver current, causing nuisance lockouts or premature control board failure.
• Install difficulty: 3/5 — Shut off power at the breaker before beginning. Tools needed: flathead & Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all low-voltage wires before disconnecting. Verify secondary output with a meter before closing the panel.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for the Carrier UPFLOW200FAU14B upflow gas furnace. Verify your unit's data plate confirms 120V/60Hz input and a 24V control circuit before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us anytime.