OEM Carrier Transformer 40VA 208/230V–24V for Model PF4MNA061T00ABAA

This OEM Carrier transformer (part number HT01CN241) is the factory-specified 40VA step-down transformer for the Carrier PF4MNA061T00ABAA air handler. Its job is to step the line voltage of 208/230V AC down to the 24V that powers your entire control circuit — thermostats, relays, contactors, and zone boards. When this transformer fails, the 24V control circuit goes dead: your thermostat goes blank, the system won't respond to any call for heating or cooling, and no components energize at all. It is frequently misdiagnosed as a failed thermostat or control board before the transformer is tested.

• Specs: 40VA capacity | 208/230V primary | 24V secondary | OEM part number HT01CN241 | Factory-matched output tolerance for reliable low-voltage control
• OEM vs Generic: This is a genuine Carrier OEM transformer built to exact factory specifications. Generic transformers frequently run off-voltage or under-rated VA capacity, risking nuisance tripping, fuse failures, and long-term damage to connected control boards.
• Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all wires before disconnecting. Verify 24V output at secondary terminals before reassembling panel.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PF4MNA061T00ABAA air handler. Verify your existing transformer's primary voltage (208/230V) and VA rating (40VA) on the data plate before ordering. Our fitment team is available to confirm compatibility — just reach out before you order and we'll verify the part for your exact unit.