OEM Carrier 40VA Control Transformer 208/230V to 24V for Model PF1MNC024000AAAA

This is the factory OEM replacement transformer (part number HT01CN241) for the Carrier PF1MNC024000AAAA fan coil unit. The transformer steps down line voltage (208/230V primary) to the 24V AC signal that powers your thermostat, relays, safety circuits, and gas valve. When this part fails, the entire control circuit goes dark — the thermostat loses power, the unit stops responding to heating and cooling calls, and no other diagnostic steps can proceed until voltage is restored.

• Specs: 208/230V primary | 24V secondary | 40VA rated | 3.55" × 2.5" × 2.8" | 2.0 lb. | Factory OEM dimensions for direct bracket fit
• OEM vs Generic: OEM transformers from Carrier are wound to exact VA and voltage tolerances, ensuring stable 24V output under full control-circuit load. Generic units may exhibit voltage sag under load, causing intermittent lockouts and nuisance tripping on sensitive control boards.
• Install difficulty: 2/5 — Always shut off power at the breaker and verify zero voltage before disconnecting. Tools needed: flathead and Phillips screwdriver, multimeter (to confirm 24V output post-install). Photograph existing wiring before removal. Typically a 15–30 minute repair for a qualified technician.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PF1MNC024000AAAA fan coil units. Also cross-references with Bryant and Payne equipment sharing the HT01CN241 specification. Always verify primary voltage (208V or 230V) and VA rating on your unit's data plate before ordering. Have a fitment question? Our HVAC parts team verifies compatibility before every order — reach out before you buy.