ICP Transformer for WUGF055AD01 — 40VA 120V to 24V | Ships Today

Overview

This OEM 40VA control transformer for the ICP (International Comfort Products) WUGF055AD01 gas furnace steps down 120V line voltage to the 24V control voltage that powers the thermostat, gas valve, and safety circuits. It includes the integrated 24V SPDT relay and receptacle assembly used in this furnace's control sequence. When a transformer fails, the entire low-voltage control system goes dead — no thermostat response, no call for heat, and no 24V at the gas valve. A buzzing transformer, a tripped control-side fuse, or a melted/discolored transformer body are clear signs of failure.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP WUGF055AD01 furnace and equivalent Tempstar, Heil, and Comfortmaker models that share this control platform. Always match the part number on your existing transformer and relay 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 wire connections and the relay socket orientation before disconnecting.
4. Remove — Disconnect the 120V primary leads and 24V secondary leads, unplug the relay, and unscrew the transformer from its bracket.
5. Install — Mount the new transformer, seat the relay, and reconnect each 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.