OEM Carrier 40VA Control Transformer 208/230V–24V for Model PF1MNC024010AAAA

This is the genuine OEM replacement control transformer (part number HT01CN241) for the Carrier PF1MNC024010AAAA fan coil / air handler unit. The transformer steps down line voltage from 208/230V to a safe 24V AC signal used by your thermostat, control board, and all low-voltage control circuitry. When the transformer fails, the entire control circuit goes dark — the thermostat displays nothing, the system refuses to respond to any call for heating or cooling, and you may measure 0V at the secondary terminals. This is one of the most commonly overlooked root causes of a completely unresponsive HVAC system.

• Specs: 208/230V Primary | 24V Secondary | 40VA rated | OEM Part # HT01CN241 | Factory-matched to Carrier PF1MNC024010AAAA specifications
• OEM vs Generic: Genuine OEM transformers are wound to exact VA and voltage tolerances. Undersized or off-spec generics can overheat under combined thermostat and control board loads, tripping thermal cutoffs and causing repeat failures.
• Install difficulty: 2/5 — Always disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdriver, multimeter, wire stripper. Test secondary output (should read 24–28V AC) before buttoning up the panel. Label all low-voltage wires before removing the old unit.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by 5 PM local time.

Compatibility: Direct OEM replacement for Carrier model PF1MNC024010AAAA. Always verify your unit's data plate voltage and VA requirements before ordering — mismatched VA ratings are a leading cause of premature transformer failure. Have a question about fitment? Our team confirms compatibility before you buy.