OEM Carrier 40VA Control Transformer 208/230V–24V for Model PF4MNB061000ABAA

This factory OEM control transformer (part #HT01CN241) is the direct replacement for the Carrier PF4MNB061000ABAA air handler. The transformer steps down 208/230V line voltage to the 24V AC signal that powers the entire control circuit — including the thermostat, contactor coil, and all safety switches. When this transformer fails, the result is total system unresponsiveness: the thermostat goes blank, no calls for heating or cooling are answered, and the system is completely dead. A failed transformer is often caused by a shorted control wire, a seized contactor coil, or a miswired thermostat drawing excessive current.

• Specs: 208/230V Primary | 24V Secondary | 40VA capacity | Foot-mount design | Factory-matched for Carrier PF4MNB061000ABAA air handler
• OEM vs Generic: OEM transformers are wound to exact VA and voltage specifications. Undersized or off-tolerance aftermarket units can overheat under normal control-circuit loads, causing nuisance shutdowns or premature failure — always use OEM in commercial or high-demand applications.
• Install difficulty: 2/5 — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Always inspect control wiring for shorts before energizing — a shorted wire will blow the new transformer immediately.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Designed for the Carrier PF4MNB061000ABAA air handler. Verify your unit's data plate shows a 208/230V primary control transformer requirement before ordering. Not sure if this is the right part? Our HVAC specialists verify fitment before you buy — reach out today and we'll confirm.