OEM Carrier 40VA Control Transformer 208/230V–24V for Model PF4MNA031L00ABAA

This OEM Carrier transformer (part #HT01CN241) is the factory-specified 40VA step-down transformer for the Carrier PF4MNA031L00ABAA fan coil / air handler unit. The transformer steps down the 208/230V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, control board, and zone valves. When this transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any call for heating or cooling, and no 24V signal reaches downstream components.

• Specs: 208/230V Primary | 24V Secondary | 40VA rated | OEM part number HT01CN241 | Factory-matched Basler Electric construction
• OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact specifications, delivering stable 24V output under full load. Generic units often run hot and produce voltage sag, which causes erratic thermostat behavior and premature control board failure.
• Install difficulty: 2/5 — Disconnect all power at the breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester, wire nuts or spade terminals. Always label all wires before disconnecting.
• Warranty: 1-year OEM manufacturer's warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered as a direct OEM replacement for the Carrier PF4MNA031L00ABAA air handler. Verify your unit's data plate shows a 208/230V primary and 24V secondary requirement before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get same-day shipping today.