OEM Carrier 24V Control Circuit Transformer HT01CN241 for Model PF4MNB061T00AAAA

This OEM step-down transformer is the factory-specified replacement for the Carrier PF4MNB061T00AAAA air handler. The transformer steps 120V line voltage down to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the system goes completely unresponsive: the thermostat goes dark, nothing calls for heating or cooling, and no fault codes are generated because the control board itself has lost power.

• Specs: 120V primary → 24V secondary output | 40VA rating | Factory-matched OEM part number HT01CN241 | Screw-terminal or plug-in lead connections
• OEM vs Generic: This is a genuine OEM Carrier transformer built to exact VA and voltage tolerance specifications. Generic transformers often run undersized VA ratings, causing voltage sag under load that triggers nuisance lockouts and premature control board failure.
• Install Difficulty: 2/5 — Shut off all power at the disconnect and breaker before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire labels or tape. Always verify 24V output with a multimeter after installation before restoring low-voltage wiring.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model PF4MNB061T00AAAA air handlers. Confirm your existing transformer's primary voltage (120V), secondary voltage (24V), and VA rating on the data plate or wiring diagram before ordering. Our parts specialists are available to verify fitment — just reach out before you order.