OEM Carrier 24V Control Transformer HT01CN241 for Model PF4MNA036000AAAA

This OEM control transformer is the factory-specified replacement part (HT01CN241) for the Carrier PF4MNA036000AAAA fan coil unit. The transformer steps down 120V line voltage to 24V AC, powering the low-voltage control circuit that operates your thermostat, relay coils, and control board logic. When this transformer fails, the entire control circuit goes dead — your thermostat will display a blank screen, the system will refuse to respond to any commands, and no heating or cooling function will operate. It is one of the first components to check when a unit appears completely unresponsive.

• Specs: 120V primary input | 24V AC secondary output | Factory-matched VA rating | Direct plug-and-play OEM replacement for part number HT01CN241
• OEM vs Generic: This is the genuine Carrier OEM transformer, built to exact factory VA rating and insulation class specifications. Generic aftermarket transformers often run at reduced VA capacity, causing voltage sag under load that leads to control board errors and premature contactor coil failure.
• Install Difficulty: 2/5 — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Label all low-voltage wires before disconnecting. Confirm primary wiring matches unit voltage.
• Warranty: 1-year OEM factory warranty coverage. Orders placed by 3 PM local time ship the same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model PF4MNA036000AAAA fan coil units. Always verify transformer VA rating and primary voltage against your unit's data plate before ordering. Not sure it fits? Contact our HVAC parts specialists — we confirm fitment before you buy.