OEM Carrier 40VA Control Transformer (HT01CN241) for Model PF1MNB024000AAAA

This OEM Carrier control transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF1MNB024000AAAA air handler. The transformer steps down the 208/230V line voltage to the 24V AC signal required to power the entire low-voltage control circuit — including the thermostat, relay coils, and control board. When this transformer fails, the system goes completely unresponsive: the thermostat goes dark, no heating or cooling stages activate, and the blower will not run. A failed transformer is one of the most commonly misdiagnosed HVAC faults, often confused with a bad thermostat or control board.

• Specs: 208/230V primary | 24V secondary | 40VA rating | OEM part number HT01CN241 | Factory-matched output tolerance for reliable low-voltage control
• OEM vs Generic: This is a genuine Carrier OEM transformer, built to exact factory specifications for the PF1MNB024000AAAA. Generic transformers may vary in VA rating and insulation class, risking nuisance tripping or premature failure under load.
• Install difficulty: 2/5 — Shut off power at the disconnect before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), wire labels or tape. Photograph all wiring connections before disconnecting. Typical job time: 20–30 minutes.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as a direct OEM replacement for the Carrier PF1MNB024000AAAA air handler. Verify your unit's data plate confirms a 208/230V primary and 24V secondary control circuit before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — contact us today and ship the same day.