OEM Carrier 40VA Control Transformer HT01CN241 for Model PF4MNA018000AAAA

This OEM Carrier control transformer (part #HT01CN241) is the factory-specified replacement for the Carrier PF4MNA018000AAAA fan coil and air handler unit. The transformer steps down 208/230V line voltage to a safe 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, reversing valve, and blower controls. When this transformer fails, the result is total control loss: a blank thermostat, an unresponsive air handler, or a system that won't respond to any call for heating or cooling.

• Specs: 40VA power rating | 208/230V primary input | 24V secondary output | 50/60Hz | Direct OEM replacement for part #HT01CN241
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, wound and tested to exact OEM tolerances. Generic transformers often use undersized cores that overheat under sustained load, leading to premature failure and voided equipment warranties.
• Install difficulty: 2/5 — Always shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wire connections before disconnecting. Verify 24V output with a multimeter before buttoning up the panel.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by 3 PM local time.

Compatibility: Designed for the Carrier PF4MNA018000AAAA fan coil/air handler. The PF4MNA018 series is an 18,000 BTU (1.5-ton) multi-position fan coil commonly paired with Carrier split-system heat pumps and air conditioners. Always confirm your existing transformer's voltage and VA rating on the unit data plate before ordering. Our HVAC parts specialists are available to verify fitment — contact us before you order.