ICP Transformer for WPG3604090LKC1 — 40VA 208/230 to 24V | Ships Today

Overview

This genuine OEM control transformer (part #1173691) with its 24V barrier (part #1178431) for the ICP WPG3604090LKC1 steps line voltage down to the 24 volts that powers the control board, thermostat, gas valve, and contactor coil. Rated at 40VA with a 208/230V primary and a 24V secondary, it supplies the low-voltage backbone of the entire control system. When a transformer fails — usually from a shorted secondary or a surge — the unit goes completely dead with no thermostat response and no control power anywhere in the system.

Specifications

Compatibility

Direct OEM replacement for the ICP / Tempstar / Heil WPG3604090LKC1 packaged unit. Confirm the 208/230V primary, 24V secondary, and 40VA rating match your original transformer before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter on both primary and secondary leads.
2. Access — Remove the service panel to reach the control compartment.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Disconnect the leads, unbolt the transformer and barrier, and remove them.
5. Install — Mount the new transformer with its barrier and reconnect primary and secondary wires per your photo.
6. Test — Restore power and confirm 24V at the secondary and normal control operation.

Signs You Need a Replacement

• Unit completely dead with no thermostat response
• No 24V control voltage measured at the secondary
• Burned smell, scorch marks, or melted transformer windings
• Repeated control-fuse or low-voltage failures

Shipping & Returns

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