OEM Carrier Control Transformer 75VA 208/240/480V → 24V for Model PH1PEB036000AAAA

This OEM Carrier control transformer (part #HT01BD242) is the factory-specified replacement for the Carrier PH1PEB036000AAAA packaged heat pump unit. The transformer steps down high-voltage line power to the 24VAC signal voltage that energizes every control circuit in your system — thermostats, contactors, reversing valves, safety switches, and the control board itself. When this transformer fails, the result is total loss of control-circuit power: the thermostat goes blank, nothing responds, and the unit will not start at all. A shorted transformer may also blow the low-voltage fuse on the control board, so always inspect and replace that fuse alongside this part.

• Specs: 75VA power rating | Primary input: 208/240/480V, 50/60Hz | Secondary output: 24VAC | Foot-mount configuration | OEM part #HT01BD242
• OEM vs Generic: The OEM HT01BD242 is wound to exact factory VA and voltage tolerances. Undersized or off-tolerance generic transformers can sag output voltage under load, causing nuisance lockouts, erratic board behavior, and premature contactor failure.
• Install difficulty: 3/5 — Shut off all power at the disconnect and breaker before proceeding. Tools needed: multimeter (verify 0VAC before touching), screwdrivers (flathead and Phillips), needle-nose pliers, wire nuts or spade connectors. Always photograph existing wiring before removal. Check and replace the 5A low-voltage fuse on the control board if blown.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement transformer for the Carrier PH1PEB036000AAAA packaged heat pump. Also cross-references to Bryant, Payne, and ICP-family units sharing the HT01BD242 specification. Verify primary voltage (208/240V or 480V) matches your unit's supply voltage before ordering. Our team is available to verify fitment — contact us before you buy if you have any doubts.