OEM Carrier Control Transformer 208/240V to 24V 40VA — Model PY1PPB036060NBAA

This OEM Carrier transformer (part #HT01BD209) is the factory-specified replacement for the Carrier PY1PPB036060NBAA packaged unit. The transformer steps down 208/240V line voltage to the 24V signal required to power thermostats, control boards, relays, and all low-voltage components. When the transformer fails, the entire control circuit goes dead — the system won't respond to the thermostat, won't stage heat or cooling, and may blow the low-voltage fuse repeatedly until the root cause is addressed.

• Specs: Input 208/240V | Output 24V | 40VA power rating | 50/60 Hz | OEM part number HT01BD209
• OEM vs Generic: OEM transformers are wound to exact VA and impedance tolerances. Undersized or off-spec aftermarket units can overheat, nuisance-trip, or damage sensitive control boards — a costly consequence for a low-cost shortcut.
• Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flat-head and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Photograph all wiring connections before removal. Verify 24V output with multimeter after installation before restoring system power.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for Carrier model PY1PPB036060NBAA. Always verify your unit's data plate input/output voltage and VA rating before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get your system back online fast.