OEM Carrier Control Transformer 208/230V to 24V 40VA for Model PF4MNB037000AAAA

This is the genuine OEM replacement control transformer (part number HT01CN241) factory-specified for the Carrier PF4MNB037000AAAA air handler. The transformer steps down line voltage to the 24V AC signal that powers your thermostat, control board, zone valves, and every other low-voltage component in the system. When the transformer fails — due to a short, wiring fault, or simply age — the entire control circuit goes dark: the thermostat goes blank, the air handler won't respond to any call, and nothing in the system will operate. Replacing it with the correct OEM unit restores factory-specified output and protects downstream components from under- or over-voltage damage.

• Specs: 208/230V primary | 24V secondary | 40VA output | Foot-mount chassis | Factory-matched output tolerance
• OEM vs Generic: This genuine Carrier HT01CN241 transformer is wound to exact factory VA and voltage specifications. Generic transformers often run inconsistent secondary voltage, which can cause nuisance lockouts, control board errors, or shortened board life.
• Install difficulty: 2/5 — Always shut off power at the breaker and verify voltage is absent before disconnecting wires. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wire connections before removal. Confirm primary tap wiring matches your supply voltage (208V or 230V).
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as the direct OEM replacement for Carrier PF4MNB037000AAAA air handlers. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — reach out before you buy for total peace of mind. Order now and this part ships today.