OEM Carrier 40VA Control Transformer 208/230V–24V for Model PF4MNB049L00ABAA

This is the factory OEM replacement control transformer (Part #HT01CN241) for the Carrier PF4MNB049L00ABAA fan coil and air handler. The transformer is the heartbeat of your HVAC system's low-voltage control circuit — it steps down the 208/230V line voltage to the 24V signal that powers your thermostat, contactor coil, relay board, and every other control component. When the transformer fails, the entire control circuit goes dead: your thermostat goes blank, your system won't call for heating or cooling, and nothing responds. A blown transformer is often caused by a shorted control wire or a failed component that drew too much current — always inspect the 24V side for shorts before installing a new unit.

• Specs: 208/230V Primary | 24V Secondary | 40VA rated | OEM Part #HT01CN241 | Factory-matched Basler Electric construction
• OEM vs Generic: This is a genuine Carrier OEM transformer built to exact factory VA and voltage tolerances. Undersized or off-brand transformers can overheat, trip the internal breaker, or deliver unstable 24V — damaging thermostats and control boards downstream.
• Install difficulty: 2/5 — Turn off power at the disconnect and breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter (to check for 24V shorts before powering up), wire nuts or spade connectors. Always verify the cause of the original failure before energizing the replacement.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PF4MNB049L00ABAA fan coil / air handler units. This transformer is also used across Carrier, Bryant, ICP, Heil, and Tempstar platforms sharing the HT01CN241 specification. Confirm your unit's data plate shows a 208/230V primary and 24V/40VA secondary requirement before ordering. Have a fitment question? Our HVAC parts team verifies compatibility before you buy — reach out before you order.