OEM Carrier 40VA Control Transformer for Model C48A202562

This OEM control transformer is the factory-specified replacement for the Carrier C48A202562 packaged unit. The transformer steps down 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, nothing in the system responds: the thermostat goes dark, the unit won't energize, and you may detect a burning smell or a blown 3A fuse on the control board. Replaces OEM part numbers HT01BD236 and HT01BD702.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | Encapsulated coil construction | Mounts with standard bracket hardware
• OEM vs Generic: This OEM transformer is wound to exact Carrier factory specifications, ensuring proper VA capacity and voltage regulation. Generic units often run underrated VA, causing coil overheating and premature failure — especially under simultaneous thermostat and contactor load.
• Install difficulty: 2/5 — Disconnect power at the breaker and confirm zero voltage with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Label or photograph all low-voltage wiring before disconnecting. Always replace the secondary-side fuse if it was blown prior to transformer failure.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model C48A202562 packaged units. Verify primary voltage (120V) on your unit's data plate and confirm 40VA rating before ordering. This part supersedes both HT01BD236 and HT01BD702 — either part number confirms fitment. Questions about fitment? Our HVAC parts specialists verify compatibility before you order.