OEM Carrier 40VA Transformer 208/230V–24V (HT01CN241) for Model PF1MNC030000AAAA

This OEM Carrier transformer (part number HT01CN241) is the factory-specified control-circuit transformer for the Carrier PF1MNC030000AAAA fan coil and air handler. It steps line voltage down from 208/230V on the primary side to a safe 24V on the secondary side, powering the thermostat wiring, control board logic, and all low-voltage relay coils throughout the system. When this transformer fails, the entire control circuit goes dead — the thermostat shows no response, the system refuses to start, and no fault codes are generated because the board itself has lost power. A burned or shorted transformer is often accompanied by a faint burnt-plastic odor near the air handler cabinet.

• Specs: 208/230V primary | 24V secondary | 40VA power rating | Direct OEM replacement for Carrier PF1MNC030000AAAA
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part built to exact OEM voltage and VA tolerances. Off-brand transformers frequently run under-rated VA capacity, causing thermal shutdowns and premature failure of downstream control boards.
• Install difficulty: 2/5 — Shut off all power to the air handler at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after installation). Label or photograph all low-voltage wiring connections before disconnecting the old unit. Secure all wire-nut connections firmly after reinstall.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Designed as a direct OEM drop-in replacement for the Carrier PF1MNC030000AAAA fan coil/air handler. Always verify your existing transformer's primary voltage (208V or 230V) and VA rating on the data plate before ordering — mismatched VA ratings are the leading cause of repeat transformer failure. Questions about fitment? Our HVAC parts specialists verify compatibility before your order ships.