OEM Carrier Control Transformer 40VA for Model C4850C50AW05061

This is the factory OEM replacement transformer (part number HT01BD236) for the Carrier C4850C50AW05061 packaged unit. The transformer steps down line voltage (120V) to the 24V signal voltage required by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dead — the thermostat display may go blank, the system won't respond to any commands, or a fuse on the control board repeatedly blows due to a shorted secondary winding.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM Part Number: HT01BD236 | Factory-matched for Carrier C4850C50AW05061 packaged units
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the factory control board. Undersized or off-tolerance generic transformers can overheat, trip thermal protection, or deliver inconsistent 24V — damaging downstream components like the contactor or gas valve.
• Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching terminals). Label all low-voltage wire connections before removing the old transformer and check for any short-circuit fault in the load before installing the new unit.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier C4850C50AW05061 packaged unit. Always verify the transformer's VA rating and primary/secondary voltages against your unit's wiring diagram and data plate before ordering. Need fitment confirmation? Our HVAC parts specialists are ready to verify compatibility before you buy — order with confidence and get back up and running today.