OEM Carrier Transformer 24V Control Circuit for Model PH3PPA060000AA

This OEM Carrier transformer (part number HT01BD242) is the factory-specified replacement for the Carrier PH3PPA060000AA packaged HVAC unit. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the system goes completely unresponsive: the thermostat goes blank, the unit won't energize, and no fault codes appear because the control circuit itself has lost power.

• Specs: 120V primary input | 24V AC secondary output | 40VA typical rating | Spade/wire-lead terminations | Factory-matched replacement for Carrier PH3PPA060000AA
• OEM vs Generic: This OEM transformer maintains the factory-specified VA rating and output voltage tolerance. Generic transformers frequently run under-rated VA, causing premature thermal cutout trips and nuisance lockouts under normal control-circuit loads.
• Install Difficulty: 2/5 — Always shut off power at the disconnect before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), wire nuts or spade connectors. Photograph all wiring before disconnecting. Confirm polarity and VA rating match your unit's data plate.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Engineered for Carrier model PH3PPA060000AA packaged units. Always verify the transformer's VA rating and input/output voltages against your unit's data plate before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy — reach out via chat or phone.