OEM Carrier 40VA Control Transformer 208/230V to 24V for Model PF4MNA024000AAAA

This OEM Carrier control transformer (part# HT01CN241) is the factory-specified replacement for the Carrier PF4MNA024000AAAA fan coil and air handler units. The transformer steps down line voltage from 208/230V on the primary side to a safe 24V on the secondary side, powering the entire low-voltage control circuit — including the thermostat, relay coils, and control board logic. When this transformer fails, the result is a completely unresponsive system: no thermostat response, no contactor pull-in, and no fan or compressor operation.

• Specs: 40VA capacity | 208/230V primary input | 24V secondary output | 60Hz | Foot-mount configuration | Factory-matched OEM tolerances
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact specifications for the PF4MNA024000AAAA. Generic transformers may deliver unstable secondary voltage, causing nuisance lockouts, control board damage, or premature contactor failure.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all low-voltage wiring before disconnecting. Verify 24V output with a multimeter after installation before restoring full system power.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.

Compatibility: Designed for Carrier model PF4MNA024000AAAA fan coil and air handler units. Always verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility prior to purchase — ships same business day when ordered before cutoff.