ICP 40VA Transformer for WUGC055CD01 — 120V to 24V with SPDT Relay | Ships Today

Overview

This OEM transformer assembly delivers 24V control power to the ICP/Heil/Tempstar WUGC055CD01 gas furnace. It steps 120V line voltage down to 24V at 40VA, powering the thermostat, gas valve, ignition control, and relays. The kit includes the OEM transformer-relay receptacle (part 97298, TRANS RELAY RECEP 120>25 40VA) and a 24V SPDT relay (part 92840). When the transformer fails the low-voltage circuit loses power entirely — the thermostat goes dark, the gas valve won't open, and the furnace won't start. A humming transformer, hot housing, or recurring fuse failures point to a worn-out 40VA transformer.

Specifications

Compatibility

A direct OEM fit for the ICP/Heil/Tempstar WUGC055CD01 gas furnace and shared-platform models using the 40VA 120V-to-24V control transformer. Confirm your model number before ordering.

Installation Guide

1. Safety First — Disconnect power at the furnace switch and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the furnace control/blower compartment service panel.
3. Document — Photograph all primary (120V) and secondary (24V) wiring before disconnecting.
4. Remove — Disconnect the leads, unbolt the failed transformer, and detach the relay from its receptacle.
5. Install — Mount the new transformer and relay, reconnecting each wire per your photo.
6. Test — Restore power, confirm 24V across the secondary terminals, and verify normal heating operation.

Signs You Need a Replacement

• Dead thermostat display and unresponsive furnace
• Buzzing or humming from the transformer
• Repeatedly blown 24V control fuse
• Burnt smell or visible scorching on the windings

Shipping & Returns

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