OEM Carrier 24V Control Transformer HT01CN241 for Model PF4MNB031T00ABAA

This OEM control transformer is the factory-specified replacement for the Carrier PF4MNB031T00ABAA air handler. The transformer steps line voltage (120V) down to 24V AC to power the entire low-voltage control circuit — including the thermostat, relay coils, and zone controls. When it fails, the result is a completely unresponsive system: the thermostat goes blank, the unit won't respond to any call for heating or cooling, and a blown 24V fuse is often the first symptom. Replacing the transformer with a genuine OEM unit (part number HT01CN241) restores factory-rated voltage output and ensures full compatibility with Carrier's control board logic.

• Specs: 120V primary input | 24V AC secondary output | 40VA typical rating | Factory-matched OEM tolerances for stable control circuit operation
• OEM vs Generic: OEM transformers are wound and rated to Carrier's exact VA and voltage specs. Generic units may under-deliver VA under load, causing nuisance trips, erratic thermostat behavior, or premature contactor coil failure.
• Install Difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Label all low-voltage wires before disconnecting. Always verify 24V output with a multimeter after installation before restoring full power.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for Carrier model PF4MNB031T00ABAA air handlers. Verify your existing transformer's primary voltage, secondary voltage, and VA rating on the unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.