OEM Carrier Control Transformer 40VA 208/230V to 24V for Model PY2PNB048115AA

This genuine OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY2PNB048115AA packaged unit. The transformer steps down the 208/230V line voltage to the 24V DC signal that powers your thermostat, control board, contactor coils, and every other low-voltage component in the system. When this part fails, nothing in the control circuit responds — the system will appear completely dead even with line voltage present at the unit.

• Specs: 40VA capacity | 208/230V primary input | 24V secondary output | 50/60Hz rated | Foot-mount configuration | Direct OEM factory replacement
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances, protecting sensitive control boards from under- or over-voltage conditions. Generic units often run outside ±5% tolerance, which can cause nuisance tripping, board damage, or premature contactor coil failure.
• Install difficulty: 2/5 — Always disconnect main power and verify zero voltage with a multimeter before proceeding. Note wire colors and terminal labels before removal. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Torque wire connections firmly to prevent intermittent faults.
• Warranty: 1-year OEM factory warranty included. Ships same business day from our warehouse. Supersedes/replaces OEM part numbers HT01BD207, HT01CN232, and 9076-00.

Compatibility: Designed for the Carrier PY2PNB048115AA packaged unit. Verify your unit's data plate shows a 208/230V single-phase control circuit before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order. In stock and ready to ship today.