OEM Carrier Furnace Transformer 40VA 120V to 24V — Model UPFLOW200U6020A

This is the factory OEM replacement transformer (part #HT01CN001) for the Carrier UPFLOW200U6020A furnace. The transformer steps down 120V line voltage to a 24V/12V secondary signal that powers your system's entire low-voltage control circuit — including the thermostat, control board, and zone valves. When this transformer fails, the most common symptoms are a completely unresponsive thermostat, a furnace that won't activate on command, or an audible buzzing or humming at the transformer itself. Without a functioning transformer, none of the system's controls can operate.

• Specs: 120V primary | 24V / 12V dual secondary output | 40VA rated | Factory-matched OEM part #HT01CN001 | Replaces legacy part numbers HT01BJ115, 19EA41612, and 19EA42612
• OEM vs Generic: This is a genuine Carrier OEM transformer — factory-wound to exact VA and voltage tolerances. Aftermarket transformers frequently run under-rated VA, causing overheating, tripped breakers, and premature control board failure. Do not risk your control board on an undersized generic.
• Install difficulty: 3/5 — Shut off all power at the breaker and disconnect the 24V wiring harness before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all low-voltage wires before disconnecting. If a fuse on the control board has blown, inspect and replace it before powering up the new transformer.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM drop-in for the Carrier UPFLOW200U6020A furnace. Verify your unit's data plate confirms 120V/60Hz primary input before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your system back online fast.