OEM Carrier Control Transformer 40VA 208/230V–24V for Model PF1MNC036000AAAA

This OEM Carrier control transformer (part #HT01CN241) is the factory-specified replacement for the Carrier PF1MNC036000AAAA fan coil and air handler systems. The transformer steps line voltage (208/230V primary) down to 24V AC on the secondary side, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the result is typically a completely dead control system: the thermostat goes blank, the unit refuses to respond to any calls for heating or cooling, and no 24V is measurable at the secondary terminals. A failed transformer is often caused by a shorted control wire or failed component overloading the secondary circuit — always inspect the 24V circuit for faults before installing the replacement.

• Specs: 40VA rating | 208/230V primary input | 24V AC secondary output | Direct OEM drop-in replacement for part #HT01CN241
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact specifications for the PF1MNC036000AAAA platform. Generic transformers often use undersized cores and lower-grade insulation, leading to overheating and premature failure under sustained HVAC load cycles.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (verify 0V before touching wiring), wire stripper. Photograph all wire connections before removal. Primary leads connect to line voltage — follow all applicable electrical codes.
• Warranty: 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse when ordered by 5 PM.

Compatibility: Confirmed fit for Carrier model PF1MNC036000AAAA. Always verify the existing transformer's VA rating, primary voltage, and secondary voltage on your unit's data plate before ordering to ensure a proper match. Have a question about fitment? Our HVAC parts specialists verify compatibility before you order — reach out today and get the right part the first time.