OEM Carrier Control Transformer 75VA 208/240/480V to 24VAC for Model PH3PEA060000AA

This OEM Carrier transformer (part #HT01BD242) is the factory-specified replacement for the Carrier PH3PEA060000AA packaged unit. The control circuit transformer steps down high-voltage supply power (208, 240, or 480V primary) to the 24VAC signal voltage that energizes every low-voltage component in your system — thermostats, contactors, relays, and control boards. When this transformer fails, the entire control circuit goes dead: the thermostat display may go blank, the system will not respond to any calls for heating or cooling, and no fault codes will appear because the board itself has no power. A failed transformer is often misdiagnosed as a bad control board — always test the transformer first.

• Specs: 75VA power rating | Primary input: 208 / 240 / 480V | Secondary output: 24VAC | 50/60Hz dual frequency | Foot-mount configuration | OEM part #HT01BD242 (supersedes HT01BD464)
• OEM vs Generic: This is the genuine Carrier OEM transformer, wound and insulated to factory tolerances. Generic transformers with undersized VA ratings can sag under load, causing nuisance lockouts, relay chatter, and premature control board failure — especially in multi-stage or heat pump systems.
• Install difficulty: 3/5 — High-voltage primary terminals require lockout/tagout before service. Tools needed: multimeter (verify 0V at primary before touching wiring), flathead and Phillips screwdrivers, wire nuts or spade connectors. Always photograph all wiring connections before disconnecting. Confirm correct primary tap (208, 240, or 480V) matches your supply voltage before energizing.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Direct OEM replacement for Carrier model PH3PEA060000AA packaged units. The 208/240/480V multi-tap primary makes this transformer suitable across a wide range of commercial and residential supply voltages. Verify your unit's supply voltage and confirm part number HT01BD242 on your existing transformer's label before ordering. Need fitment help? Our HVAC parts specialists verify compatibility before you order — no guesswork.