OEM Carrier 24V Control Transformer HT01CN241 for Model PF4MNA019L00ABAA

This OEM control transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF4MNA019L00ABAA fan coil unit. The transformer steps down 120V line voltage to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, control board, reversing valves, and relay coils. When this transformer fails, the system goes completely silent: no thermostat response, no blower operation, and no control at all. A blown fuse on the secondary side is often the first clue.

• Specs: Input: 120V AC | Output: 24V AC | Capacity: 40VA | OEM Part Number: HT01CN241 | Factory-matched construction and thermal protection
• OEM vs Generic: This is the exact OEM factory unit. Generic transformers often use thinner wire windings and lack proper thermal cutoffs, risking secondary fuse blowouts and repeated callbacks. OEM ensures proper VA capacity for the full control load of the PF4MNA019L00ABAA.
• Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label and photograph all low-voltage wiring before disconnecting. Test output voltage after installation before closing the panel.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed specifically for the Carrier PF4MNA019L00ABAA fan coil unit. Always verify input voltage and VA rating on your unit's data plate before ordering. If you are unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you buy — no guesswork required.