OEM Carrier Control Transformer 40VA 120V–24V for Model PF1MNC043T00AAAA

This OEM control transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF1MNC043T00AAAA air handler. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the entire control system goes dark: your thermostat loses power, the system won't respond to calls for heating or cooling, and you may measure zero voltage on the secondary side of the transformer.

• Specs: 120V primary | 24V secondary | 40VA rated | Factory OEM replacement for part HT01CN241 | Direct plug-in or wire-terminal mount
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances for the Carrier PF1MNC043T00AAAA control circuit. Generic units may undervolt sensitive boards, causing erratic operation or nuisance lockouts.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always verify 0V on the primary leads before touching terminals. Photograph original wiring before disconnecting.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered specifically for the Carrier PF1MNC043T00AAAA air handler. Always confirm the part number printed on your existing transformer before ordering to ensure an exact match. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — contact us before ordering.