OEM Carrier Control Transformer 40VA 208/240V to 24V for Model PY2PPB030060AB

This genuine OEM control transformer (part number HT01BD209) is the factory-specified replacement for Carrier PY2PPB030060AB HVAC systems. The transformer steps down line-voltage power (208/240V primary) to the 24V secondary signal that feeds your thermostat, control board, and all low-voltage components. When it fails, the entire control circuit goes dark — no thermostat response, no ignition sequence, and nothing happens when you call for heating or cooling. A failed transformer is often misdiagnosed as a bad control board, making this an essential first diagnostic replacement.

• Specs: 40VA | 208/240V Primary | 24V Secondary | 50/60Hz | Direct OEM replacement for HT01BD207, HT01CN232, and 9076-00
• OEM vs Generic: OEM transformers are wound and rated to Carrier's exact VA and insulation specifications, ensuring the 24V rail stays clean and stable under full load. Undersized or off-tolerance aftermarket transformers can overheat, trip thermal cutoffs, and damage downstream control boards.
• Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: multimeter (to verify 0V before touching wiring), flathead and Phillips screwdrivers, wire nuts or terminal connectors. Photograph the existing wiring before removal. Typical swap time is 15–30 minutes for experienced DIYers.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PY2PPB030060AB. Always verify transformer VA rating and primary voltage against your unit's data plate before ordering. Not sure if this part fits your system? Our HVAC parts team verifies fitment before you order — contact us before checkout.