OEM Carrier Control Transformer 208/230V–24V 40VA for Model PF1MNB036005AAAA

This OEM Carrier transformer (part #HT01CN241) is the factory-specified 40VA step-down transformer for the Carrier PF1MNB036005AAAA air handler. It converts 208/230V line voltage down to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the system goes completely dark: no thermostat response, no fan operation, and no heating or cooling. A blown fuse on the secondary side is often the first clue that the transformer has failed or is being over-loaded by a shorted low-voltage wire.

• Specs: 208/230V primary | 24V secondary | 40VA rating | Direct OEM replacement for Carrier part #HT01CN241
• OEM vs Generic: This is the genuine factory OEM part — manufactured to exact Carrier voltage and VA tolerances. Generic transformers often run under-rated VA, causing nuisance tripping and premature failure under full control-circuit loads.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), wire nuts or spade terminals. Always confirm primary and secondary wiring polarity before energizing. Check for secondary short circuits (shorted thermostat wire) before replacing, or the new transformer will fail immediately.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier PF1MNB036005AAAA air handler. Verify your unit's data plate shows 208/230V primary input and 24V/40VA secondary control circuit before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — order with confidence and get it shipped today.