OEM Carrier Control Transformer 208/230V 40VA — HT01CN241 for Model PF1MNC018010AAAA

This OEM Carrier transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF1MNC018010AAAA fan coil / air handler unit. The transformer steps down 208/230V line voltage to a safe 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, relays, and zone boards. When this transformer fails, the result is total loss of control voltage: your thermostat goes dark, the system won't respond to calls for heating or cooling, and no fault codes appear on the board because there is no power to generate them.

• Specs: 208/230V primary input | 24V secondary output | 40VA power rating | Class 2 control transformer | Factory-matched OEM unit
• OEM vs Generic: OEM transformers are wound to exact Carrier specifications, ensuring stable voltage regulation under load. Generic units can sag under peak demand, causing random lockouts, relay chatter, and premature control board failure.
• Install difficulty: 2/5 — Always shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Confirm 24V output at secondary terminals after installation before closing the cabinet. Label all wiring before disconnecting the old unit.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PF1MNC018010AAAA fan coil unit. Verify your unit's data plate lists a 208/230V primary, 24V secondary, 40VA transformer before ordering. Our team is available to confirm fitment — contact us before you buy if you have any questions.