OEM Carrier Control Transformer 40VA 208/240V to 24V for Model SUBCLR50HJ402461

This genuine OEM control transformer (part number HT01BD209) is the factory-specified replacement for the Carrier SUBCLR50HJ402461. The transformer steps down line voltage from 208/240V to the 24V AC required to power the low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When this part fails, the entire control circuit goes dark: the thermostat goes blank, the system becomes completely unresponsive, or fuses blow repeatedly. Replacing a failed transformer restores full system operation immediately.

• Specs: 40VA | Primary: 208/240V | Secondary: 24V | 50/60 Hz | OEM Part# HT01BD209 | Replaces HT01BD207, HT01CN232, 9076-00
• OEM vs Generic: The OEM transformer is wound to exact factory tolerances, ensuring stable 24V output under full VA load. Generic substitutes can exhibit voltage sag under peak demand, causing nuisance lockouts and premature control board failure.
• Install Difficulty: 2/5 — Disconnect all power at the breaker before beginning. Tools needed: flathead and Phillips screwdriver, multimeter (confirm 0V before touching wiring), wire nuts or terminal connectors. Photograph or label all wiring connections before removal. Check for a blown fuse or short in the secondary circuit before installing the new transformer — an uncleared short will destroy the replacement.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as the direct OEM replacement for Carrier model SUBCLR50HJ402461. Also replaces legacy Carrier transformer part numbers HT01BD207, HT01CN232, and 9076-00. Always verify primary voltage (208V or 240V) against your unit's data plate before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you order — reach out before placing your order for total peace of mind.