OEM Carrier 40VA Control Transformer for Model P110SBP2212A

This OEM Carrier control transformer (part# P201-2201) is the factory-specified replacement for the P110SBP2212A unit. The transformer steps down 120V line voltage to the 24V control circuit voltage that powers your thermostat, contactor coil, gas valve, and all low-voltage control components. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and no fault codes will display. A failed transformer is often misdiagnosed as a thermostat or control board issue, so always verify 24V output at the secondary terminals before replacing other components.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number P201-2201 | Factory-matched construction for reliable low-voltage output
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control circuit. Undersized or off-tolerance generic units can overheat, trip the internal fuse, or deliver unstable voltage that damages control boards and thermostats.
• Install difficulty: 2/5 — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter to verify 24V output after install. Label or photograph all wiring connections before disconnecting the old transformer.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model P110SBP2212A. Always verify input voltage (120V), output voltage (24V), and VA rating on your unit's data plate before ordering to ensure correct fitment. Have a question about compatibility? Our HVAC parts specialists confirm fitment before you buy — no guesswork required.