OEM Carrier Control Transformer 40VA 208/230V–24V for Model PF1MNC030005AAAA

This is the genuine OEM Carrier control transformer (part number HT01CN241), factory-specified for the Carrier PF1MNC030005AAAA fan coil unit. The control transformer steps line voltage down from 208/230V to a safe 24V AC signal that powers the thermostat, control board, and all low-voltage control circuit components. When this transformer fails, the entire 24V control circuit goes dark — you'll see no thermostat response, no relay or contactor actuation, and the system will appear completely unresponsive even though line voltage is present at the unit.

• Specs: 40VA power rating | 208/230V primary input | 24V secondary output | Direct OEM drop-in replacement | Part No. HT01CN241
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to exact impedance and thermal specifications. Off-brand transformers may share the same voltage ratings but often use lower-grade core laminations, leading to overheating, premature failure, and nuisance tripping of thermal protection circuits.
• Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching wires). Label or photograph all wiring connections before removal. Reconnect to the same terminals on the new unit.
• Warranty: 1-year OEM manufacturer warranty included. In-stock units ship same business day when ordered by cutoff time.

Compatibility: Factory-matched for the Carrier PF1MNC030005AAAA fan coil unit. Confirm your unit's data plate shows a 208/230V primary and 24V secondary control circuit before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before every order — reach out and we'll confirm in minutes.