OEM Carrier 40VA Control Transformer P201-35150 for Model YAC36100YAC307

This OEM control transformer (part number P201-35150) is the factory-specified replacement for the Carrier YAC36100YAC307 condensing unit. The transformer steps down 120V line voltage to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the entire system goes dark: the thermostat loses communication, the contactor won't energize, and nothing responds. A failed transformer is one of the most common causes of a completely unresponsive HVAC system.

• Specs: 40VA rating | 120V primary → 24V secondary | OEM factory-matched impedance and thermal protection | Designed for Carrier YAC36100YAC307 control circuit requirements
• OEM vs Generic: The OEM P201-35150 transformer is wound and rated to Carrier's exact VA and voltage tolerance specifications. Generic transformers may be under-rated in VA, causing overheating, nuisance tripping, or premature failure under full control-circuit load.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, needle-nose pliers. Always label or photograph existing wire connections before removing the old transformer.
• Warranty: 1-year OEM factory warranty against defects. Orders placed by 3 PM local time ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier YAC36100YAC307 condensing unit. Verify your unit's control voltage and VA requirements on the data plate inside the access panel before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you purchase — contact us anytime.