OEM Carrier 40VA Control Transformer 208/230V–24V for Model PF4MNA031T00ABAA

This OEM control transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF4MNA031T00ABAA fan coil and air handler. The transformer steps down 208/230V line voltage to the 24V signal used by your thermostat, control board, and all low-voltage components. When this part fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any calls for heating or cooling, and nothing powers on despite line voltage being present at the unit.

• Specs: 208/230V Primary | 24V Secondary | 40VA capacity | Direct OEM drop-in replacement (Part # HT01CN241)
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, built to exact factory tolerances. Generic transformers often use undersized VA ratings and inferior core materials, leading to premature burnout and nuisance tripped fuses on the 24V circuit.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Note primary and secondary wire colors before disconnecting, and confirm VA rating on your unit's data plate. The transformer mounts via foot bracket with two screws.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PF4MNA031T00ABAA fan coil/air handler. Verify 208/230V primary voltage and 24V secondary on your system's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — order with confidence and get back to comfort fast.