OEM Carrier Transformer 40VA 120V/24V for Model LC748LCCSRLPX2600

This OEM replacement transformer (part# HT01BD702) is the factory-specified step-down control transformer for the Carrier LC748LCCSRLPX2600. It converts 120V line voltage down to the 24V AC signal required to power the control board, thermostat, and all low-voltage switching circuits. When this transformer fails, the entire control circuit goes dark — your thermostat will appear dead, the system will not respond to any calls for heating or cooling, and no fault codes will display. It is one of the first components to check when nothing in the system responds.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM Part Number: HT01BD702 | Factory-matched impedance and thermal protection
• OEM vs Generic: This factory OEM transformer is wound to exact VA and voltage specifications for the LC748LCCSRLPX2600 control circuit. Generic transformers frequently underrate their true VA capacity, leading to voltage sag under load and repeated nuisance lockouts — or premature failure within one season.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, wire nuts. Label or photograph all low-voltage wire connections before removal. Installation typically takes 20–30 minutes for a qualified technician.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed for the Carrier LC748LCCSRLPX2600. Always confirm primary voltage (120V), secondary voltage (24V), and VA rating on your existing transformer's label before ordering to ensure a correct fitment. Our parts specialists are available to verify compatibility before you purchase — no guessing required. Order today and receive same-day shipping.