OEM Carrier 40VA Control Transformer HT01BD209 for Model PY2PNB030060NB

This OEM control transformer (part# HT01BD209) is the factory-specified replacement for the Carrier PY2PNB030060NB packaged unit. The transformer steps down line voltage (120V) to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dead: the thermostat shows no response, the system won't energize, and nothing happens on a call for heating or cooling.

• Specs: 40VA rating | 120V primary / 24V secondary | Direct OEM replacement | Factory-matched output for stable control voltage
• OEM vs Generic: This is a genuine Carrier OEM transformer built to exact VA and voltage tolerances. Generic transformers often run undervoltage under load, causing intermittent lockouts, nuisance tripping of fuses, and premature control board failure — making the OEM choice the most cost-effective long-term solution.
• Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output post-install), wire nuts or spade terminals. Always confirm primary and secondary wiring polarity matches original configuration.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered as a direct drop-in replacement for Carrier model PY2PNB030060NB packaged units. Verify your existing transformer's VA rating and primary/secondary voltage on the unit data plate before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — just reach out before placing your order.