OEM Carrier Control Transformer 75VA 208/240/480V to 24VAC for Model PH2PPB042000AA

This is the factory OEM replacement control transformer for the Carrier PH2PPB042000AA packaged heat pump unit. The transformer steps down high-voltage power (208/240/480V primary) to the 24VAC signal required to energize your thermostat, control board, and all low-voltage relays. When this transformer fails, the entire control circuit goes dead — the system will not respond to the thermostat, contactors will not pull in, and nothing will operate. No hum, no click, no heat or cooling.

• Specs: 75VA power rating | Primary: 208/240/480V | Secondary: 24VAC | Frequency: 50/60Hz | Foot-mount configuration | OEM Part #: HT01BD242
• OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic transformers frequently run under-rated VA, causing premature overheating, nuisance tripping of the internal fuse, and shortened control board life.
• Install Difficulty: 3/5 — Disconnect ALL power before servicing. High-voltage primary leads (up to 480V) are present inside the unit. Tools needed: multimeter (verify 24VAC output after install), wire stripper, screwdriver set, needle-nose pliers. Always verify primary tap matches your supply voltage before wiring.
• Warranty: 1-year OEM manufacturer warranty included. In-stock units ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PH2PPB042000AA packaged heat pump. This transformer is also cross-compatible with select Carrier, Bryant, and Payne packaged and split-system units sharing the HT01BD242 specification — verify your unit's data plate primary voltage tap before ordering. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.