OEM Carrier Transformer 120V–24V 40VA for Model PF4MNB061L00ABAA

This OEM control transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF4MNB061L00ABAA air handler. The transformer steps down line voltage from 120V to 24VAC to power the entire low-voltage control circuit — including the thermostat, control board, and zone valves. When it fails, the result is total system non-response: the thermostat goes blank, no calls for heating or cooling are executed, and the unit sits completely inert. A blown transformer is often caused by a short in the control wiring, so always inspect the low-voltage circuit before installing the replacement.

• Specs: Primary voltage: 120VAC | Secondary voltage: 24VAC | VA rating: 40VA | Factory OEM part number: HT01CN241 | Direct plug-in replacement, no wiring modifications required
• OEM vs Generic: This is a genuine OEM Carrier transformer wound to exact factory specifications. Generic units frequently feature lower-grade core laminations and looser VA tolerances, which can cause voltage sag under full control-circuit load — stressing the control board and shortening its life.
• Install difficulty: 2/5 — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24VAC output after install). Inspect all 24V wiring for shorts before energizing. Photograph existing wiring connections prior to removal.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PF4MNB061L00ABAA air handler. Verify primary/secondary voltage and VA rating on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists will confirm fitment before you buy — order with confidence.