OEM Carrier Control Transformer 208/230V–24V 40VA for Model PF1MNB042000AAAA

This is the genuine OEM Carrier replacement transformer (part number HT01CN241) for the PF1MNB042000AAAA fan coil and air handler unit. The control transformer steps down the 208/230V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dark — your thermostat goes blank, your system refuses to start, and no heating or cooling is delivered. Replacing it with the correct OEM part restores full factory operation immediately.

• Specs: 208/230V Primary | 24V Secondary | 40VA output rating | Direct OEM fitment for Carrier HT01CN241 — matches factory wiring harness and mounting footprint exactly
• OEM vs Generic: OEM Carrier transformers are wound to exact VA and voltage tolerances, protecting sensitive control boards and thermostats from voltage sags or surges. Generic transformers often run under-rated VA, causing nuisance tripping of internal breakers and premature board failures.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all low-voltage wiring connections (R, C, Y, W, G) before disconnecting. Confirm 24VAC output with a multimeter after installation before restoring full power.
• Warranty: 1-year OEM manufacturer's warranty. In-stock and ships same business day from our warehouse when ordered by 5PM.

Compatibility: Engineered and factory-specified for the Carrier PF1MNB042000AAAA fan coil/air handler. This transformer is also cross-referenced across the Carrier, Bryant, Payne, ICP, Heil, and Tempstar equipment families sharing the HT01CN241 specification. Always verify your unit's data plate shows 208/230V primary voltage before ordering. Have your model number ready and our fitment team will confirm compatibility before you purchase — contact us today and ship today.