OEM Carrier 40VA Control Transformer HT01CN241 for Model PF4MNB037000ABAA

This is the genuine OEM Carrier replacement transformer (part# HT01CN241) for the Carrier PF4MNB037000ABAA fan coil and air handler series. The 24V control transformer is the heartbeat of your HVAC control circuit — it steps down the 208/230V line voltage to the 24V AC signal that powers your thermostat, control board relays, and zone valves. When this transformer fails, the entire control circuit goes dark: the thermostat shows no power, the system refuses to heat or cool, and no error codes are generated because there's no power to generate them.

• Specs: 40VA capacity | 208/230V primary input | 24V AC secondary output | Foot-mount configuration | Direct OEM replacement for Carrier part# HT01CN241
• OEM vs Generic: OEM transformers are wound to exact factory VA and voltage specifications, protecting sensitive control boards from voltage fluctuations. Generic units often under-deliver VA capacity, causing intermittent control lockouts and premature board failures.
• Install difficulty: 2/5 — Shut off all power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all 24V low-voltage wires before disconnecting. Verify fuse or circuit breaker on secondary side before condemning the transformer.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PF4MNB037000ABAA fan coil unit. Also cross-references to ICP, Heil, Tempstar, and Comfortmaker systems sharing the HT01CN241 specification. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.