OEM Carrier Control Transformer 208/230V 40VA for Model PF4MNA031000ABAA

This is the factory OEM replacement transformer (Part #HT01CN241) for the Carrier PF4MNA031000ABAA air handler. The transformer steps down 208/230V line voltage from the primary circuit to a safe 24V AC output that powers the entire low-voltage control circuit — including the thermostat, relay coils, and control board. When this transformer fails, the system loses all control voltage and nothing works: no heating, no cooling, no fan — the system goes completely dead or blows a low-voltage fuse repeatedly.

• Specs: 208/230V Primary | 24V Secondary | 40VA Power Rating | Factory OEM part number HT01CN241 | Direct plug-in replacement, no wiring modifications needed
• OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic transformers can run outside rated VA, causing nuisance fuse trips, shortened control board life, and unreliable thermostat response. OEM is always the right call for control circuit components.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Label all low-voltage wires before disconnecting the old unit. Verify 24V output with a multimeter before re-energizing the full system.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as a direct OEM replacement for the Carrier PF4MNA031000ABAA air handler. Verify your unit's data plate shows 208/230V primary and 24V secondary control circuit before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.