OEM Carrier Transformer 40VA 120V to 24V for Model CLINK48TMFSRSDL601

This OEM Carrier transformer (part number HT01BD702) is the factory-specified replacement for the CLINK48TMFSRSDL601 packaged unit. The control circuit transformer steps down 120V line voltage to 24V to power the thermostat, contactor coil, and all low-voltage control components. When the transformer fails — due to a wiring short, overloaded control circuit, or age — absolutely nothing in the system responds: the thermostat goes blank, the contactor won't pull in, and the unit sits completely dead. Replacing the transformer is one of the most straightforward repairs on any HVAC system and immediately restores control circuit function.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD702 | Factory-matched to Carrier CLINK48TMFSRSDL601 control board requirements
• OEM vs Generic: This OEM unit meets Carrier's exact VA rating and insulation class. Undersized or off-brand transformers can overheat under normal control circuit loads, causing nuisance failures and potentially damaging connected boards and thermostats.
• Install difficulty: 2/5 — Disconnect power at the disconnect box before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 24V output with a meter before reconnecting the control circuit. Note wire colors and terminal markings before removing the old unit.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier CLINK48TMFSRSDL601 packaged unit. Confirm your existing transformer's VA rating and primary/secondary voltages on the unit's data plate or wiring diagram before ordering. If you've experienced repeated transformer failures, inspect the secondary side for wiring shorts before installing the replacement. Our HVAC parts specialists are available to verify fitment — order with confidence.