ICP Transformer for WUGE125AH01 — 40VA 120V to 24V | Ships Today

Overview

This OEM 40VA control transformer assembly for the ICP (International Comfort Products) WUGE125AH01 gas furnace converts 120V line voltage to the 24V control voltage that drives the thermostat, gas valve, and safety circuits. It includes the integrated 24V relays and receptacle used in this furnace's sequence of operation. A failed transformer kills the entire low-voltage control system — the thermostat goes blank, there is no call for heat, and no 24V reaches the gas valve. Buzzing, a burnt odor, or a discolored transformer body all indicate the part is failing.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP WUGE125AH01 furnace and equivalent Tempstar, Heil, and Comfortmaker models on this control platform. Match the part numbers on your existing transformer and relays before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter at the transformer primary.
2. Access — Remove the furnace control/blower compartment service panel.
3. Document — Photograph all primary and secondary wiring and relay socket positions before disconnecting.
4. Remove — Disconnect the 120V primary leads and 24V secondary leads, unplug the relays, and unscrew the transformer from its bracket.
5. Install — Mount the new transformer, seat each relay, and reconnect every wire exactly per your photo.
6. Test — Restore power and confirm 24V at the secondary and a normal heat call.

Signs You Need a Replacement

• No 24V control voltage — thermostat and gas valve are completely dead.
• Audible buzzing or humming from the transformer.
• Burnt smell, discolored or swollen transformer body.
• Repeated control-circuit fuse or breaker trips.

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.