OEM Carrier Control Transformer 208/230V to 24V 40VA for Model PF4MNB049T00ABAA

This OEM Carrier transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF4MNB049T00ABAA air handler. The transformer steps down 208/230V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coils, and control board. When this part fails, the result is a completely unresponsive system: the thermostat goes blank, the unit refuses to start, or the system blows a low-voltage fuse repeatedly. Replacing the transformer is typically the first diagnostic step when 24V is absent at the control board.

• Specs: 208/230V Primary | 24V Secondary | 40VA rated | Direct OEM drop-in replacement for Carrier part HT01CN241
• OEM vs Generic: This is a genuine OEM Carrier transformer built to exact factory VA and voltage specifications. Generic transformers often run off-spec VA ratings, causing erratic thermostat behavior, nuisance fuse failures, or premature control board damage.
• Install difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Note all wire terminal labels before disconnecting. Confirm 24V output after installation before restoring full system power.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Confirmed OEM fit for Carrier model PF4MNB049T00ABAA air handler. Always verify your unit's data plate voltage rating matches the 208/230V primary input before ordering. Our fitment team is available to confirm compatibility before you purchase — order with confidence from NationalHVACParts.com.