OEM Carrier 40VA Control Transformer 208/230V–24V for Model PF4MNA024T00AAAA

The Carrier HT01CN241 is the factory-specified OEM control transformer for the PF4MNA024T00AAAA air handler. Its job is to step down 208/230V line voltage to the 24V that powers every low-voltage control circuit in your system — including the thermostat, reversing valve, blower relay, and any zone controls. When this transformer fails, the entire control circuit goes dark: your thermostat goes unresponsive, the system will not start, and no low-voltage signals can pass. A failed transformer is often indicated by a tripped secondary fuse or a complete loss of thermostat display with no other obvious cause.

• Specs: 208/230V primary | 24V secondary | 40VA power rating | Direct OEM replacement for part number HT01CN241
• OEM vs Generic: This is a genuine Carrier OEM part built to exact factory specifications, ensuring correct VA capacity and winding insulation class. Generic transformers may be undersized or improperly rated, risking nuisance tripping, overheating, or repeated fuse failure under normal load.
• Install Difficulty: 2/5 — Shut off all power to the unit before beginning. Label all low-voltage wiring before disconnecting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 24V output after installation before re-energizing the full system. Inspect and replace the secondary fuse if the original transformer failed due to a short.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PF4MNA024T00AAAA air handler. Always verify your unit's data plate confirms 208/230V primary voltage before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy — order today and get same-day shipping.