OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY3PNA060130AA

This factory OEM control transformer (part# HT01BD209) is the direct, factory-specified replacement for the Carrier PY3PNA060130AA packaged unit. The transformer steps down high-voltage line power (208/240V) to the 24V AC signal that energizes every component in the control circuit — including the thermostat, contactor coil, gas valve, and control board. When this part fails, the entire low-voltage control circuit goes dead: the thermostat goes blank, relays won't energize, and the system will not heat or cool regardless of thermostat calls.

• Specs: 208/240V primary input | 24V secondary output | 40VA power rating | 50/60 Hz | Factory-matched OEM tolerances
• OEM vs Generic: OEM transformers are wound to exact factory VA ratings and insulation class, preventing overheating under sustained load. Generic units often run undersized VA capacity, leading to premature burnout and nuisance tripping of thermal fuses in the control board.
• Install difficulty: 2/5 — Turn off all power and confirm voltage is zero before disconnecting leads. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label and photograph all wiring connections before removal. Verify correct primary tap (208V vs 240V) to match your supply voltage.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PY3PNA060130AA packaged unit. Always verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy — order with confidence.