OEM Carrier 75VA Control Transformer HT01BD242 for Model PH2PPB030000AB

This is the OEM factory-specified control transformer for the Carrier PH2PPB030000AB packaged heat pump unit. The transformer steps down high-voltage primary power (208/240/480V) to the 24VAC signal voltage that powers the control board, thermostat circuit, and all low-voltage switching components. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, no contactor closes, and nothing operates. It is a root-cause failure that is often misdiagnosed as a control board or thermostat problem.

• Specs: Primary Input: 208/240/480V | Secondary Output: 24VAC | Power Rating: 75VA | Mounting Style: Foot Mount | Frequency: 50/60Hz | OEM Part #: HT01BD242
• OEM vs Generic: This OEM transformer is wound to exact Carrier factory tolerances. Generic substitutes frequently run at reduced VA capacity, causing brownouts on the 24V circuit under load — leading to erratic lockouts, contactor chatter, and premature board failures.
• Install Difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24VAC output after installation). Label and photograph all low-voltage wiring before disconnecting. Standard foot-mount bracket aligns directly with original mounting holes.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Designed as the direct OEM replacement for Carrier PH2PPB030000AB packaged heat pump units. This 75VA transformer is also used across a wide range of Carrier, Bryant, and Payne packaged units, rooftop units (RTUs), and split systems sharing the same control circuit specification. Always verify input voltage (208/240/480V) and VA rating (75VA) against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — ships today.