OEM Carrier Control Transformer 208/230V–24V 40VA for Model PF4MNB037L00ABAA

This is the genuine OEM Carrier replacement transformer (part number HT01CN241) factory-specified for the Carrier PF4MNB037L00ABAA fan coil and air handler. The transformer steps down the 208/230V line voltage to a safe 24V AC signal that powers your entire control circuit — including the thermostat, contactor coil, and control board. When the transformer fails, the result is total loss of system control: the thermostat goes blank, the system won't respond to calls for heating or cooling, and no low-voltage signals can reach any component. Replacing it with the correct OEM part restores factory-grade reliability instantly.

• Specs: 208/230V Primary | 24V Secondary | 40VA Power Rating | Foot-mount configuration | Replaces OEM part HT01CN241
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control boards. Undersized or off-tolerance aftermarket units can cause nuisance tripping, brownouts on the control circuit, or premature board failure — choose OEM for peace of mind.
• Install difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after installation). Label all wires before disconnecting from the old transformer terminals.
• Warranty: 1-year OEM manufacturer's warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for the Carrier PF4MNB037L00ABAA fan coil unit. Verify your existing transformer's primary voltage (208V or 230V) and VA rating on the data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order — reach out today.