ICP 40VA Transformer for WUGD080CF01 – 120V to 24V Control Transformer | Ships Today

Overview

This OEM 40VA control transformer (part #97298, TRANS RELAY RECEP 120>24 40VA) supplies the low-voltage 24V control power that runs the thermostat, gas valve, ignition control, and relays in your ICP/Heil/Tempstar WUGD080CF01 gas furnace. It steps 120V line voltage down to 24V secondary at 40VA, the standard load rating for residential furnace control circuits. The matched 24V SPDT relay (part #92840, RELAY 24V SPDT S) switches blower or auxiliary loads on the control board. When a transformer fails — typically from a shorted thermostat wire, a stuck contactor, or simple age — you lose all 24V control: the furnace goes completely dead, the thermostat screen blanks, or you smell burnt insulation near the control box.

Specifications

Compatibility

Engineered as the factory-original 24V control transformer for the ICP / Heil / Tempstar / Comfortmaker WUGD080CF01 gas furnace. The 40VA / 120V-to-24V rating is also common across many ICP-family WUGD and WUGC furnace platforms, but always confirm against your unit's nameplate and wiring diagram before installing.

Installation Guide

1. Safety First – Disconnect power at the furnace switch and breaker; verify zero voltage at the transformer primary with a multimeter.
2. Access – Remove the furnace control/blower access panel.
3. Document – Photograph every primary and secondary wire and the relay orientation before disconnecting.
4. Remove – Unplug the relay, label and disconnect the 120V primary and 24V secondary leads, then unbolt the old transformer from its mounting bracket.
5. Install – Mount the new transformer, reconnect the primary and secondary leads per your photo, and seat the 24V SPDT relay in its receptacle.
6. Test – Restore power and confirm 24V across the secondary and normal call-for-heat operation.

Signs You Need a Replacement

• Furnace completely dead — no response to thermostat and no blower.
• Blank or unpowered thermostat (no 24V at R-C).
• Blown control fuse that re-blows, or a burnt smell near the control box.
• Measured 0V or incorrect voltage on the 24V secondary with 120V present on the primary.

Shipping & Returns

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