OEM Carrier 40VA Control Transformer HT01BD209 for Model PY3PPA060130AA

This OEM step-down transformer (part number HT01BD209) is the factory-specified replacement for the Carrier PY3PPA060130AA packaged unit. The transformer steps line voltage down from 120V to 24V to power the low-voltage control circuit — including the thermostat, contactor coil, and all safety controls. When this part fails, the entire control circuit goes dead: the thermostat shows no response, the system won't call for heating or cooling, and no 24V signal is available at the board. A blown transformer is often caused by a short in the low-voltage wiring, so always inspect thermostat wiring before installing the replacement.

• Specs: Input: 120V AC | Output: 24V AC | VA Rating: 40VA | Factory OEM part number HT01BD209 | Class 2 transformer with integral thermal overload protection
• OEM vs Generic: This is the genuine Carrier OEM transformer, wound and rated to exact factory specifications. Generic aftermarket transformers frequently underperform their rated VA, causing nuisance tripping, brownouts on the control board, or premature failure — especially in systems with multiple 24V accessories.
• Install Difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts. Photograph all low-voltage wiring before disconnecting. Always test for shorts in the thermostat wiring before energizing the new transformer.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier PY3PPA060130AA packaged unit. Verify input voltage and VA rating on your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists can confirm compatibility before you buy — same-day support available.