OEM Carrier 40VA Control Transformer 208/230V–24V for Model PF4MNA024L00AAAA

This is the genuine OEM replacement control transformer for the Carrier PF4MNA024L00AAAA air handler. The transformer steps down the 208/230V line voltage to the 24V signal voltage that powers your thermostat, control board, zone valves, and every other low-voltage component in the system. When this transformer fails, the entire control circuit goes dark — the thermostat goes blank, the system stops responding to calls for heating or cooling, and no safety controls can operate. Replacing a failed transformer with the correct OEM unit (part number HT01CN241) restores full system operation immediately.

• Specs: 208/230V Primary | 24V Secondary | 40VA capacity | OEM part number HT01CN241 | Factory-matched to Carrier specifications
• OEM vs Generic: OEM transformers are wound and insulated to exact Carrier tolerances, delivering stable, clean 24V output. Generic transformers often have looser voltage regulation, which can cause nuisance lockouts, erratic thermostat behavior, or premature control board failure.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to confirm 24V output post-install), wire nuts or terminals. Label all wires before disconnecting the old unit.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as the factory-specified transformer for Carrier model PF4MNA024L00AAAA. Also used across compatible Carrier air handlers, fan coil units, and heat pump systems specifying the HT01CN241. Always verify your existing transformer's voltage and VA ratings on the unit data plate before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today.