OEM Carrier 40VA Control Transformer for Model P1011601A — Part# HT01BC208

This OEM replacement control transformer is the factory-specified part for Carrier P1011601A HVAC equipment. The transformer steps down 120V line voltage to the 24V signal voltage required by your thermostat, control board, and low-voltage control circuit. When this component fails, the entire control circuit goes dead — your thermostat goes blank, the system ignores calls for heating or cooling, and no components respond. A failed transformer is one of the most common causes of a completely unresponsive HVAC system.

• Specs: 40VA rating | 120V primary / 24V secondary | OEM part number HT01BC208 | Factory-matched output for stable low-voltage control circuit performance
• OEM vs Generic: This is a genuine OEM Carrier transformer, wound and tested to exact factory VA and voltage tolerances. Generic transformers often run outside rated VA capacity, causing overheating, nuisance tripping of the built-in fuse, or premature control board failure due to voltage fluctuation.
• Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Always label or photograph all low-voltage wiring before disconnecting terminals.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model P1011601A. Verify your existing transformer's VA rating and primary/secondary voltages on the data plate before ordering to ensure an exact match. Not sure it fits? Our HVAC parts team is available to confirm fitment before you purchase — just reach out before ordering.