ICP 40VA Transformer for WPG4364060LKB1 — 208/230V to 24V | Ships Today

Overview

This genuine OEM 40VA control transformer (part 1173691) steps 208/230V line voltage down to the 24V low-voltage power that runs the thermostat, control board, contactor coil, and gas valve on the ICP / Tempstar / Heil WPG4364060LKB1 packaged unit. It ships with the matching 24V barrier (part 1178431) used for safe terminal separation. When the transformer fails — usually from a shorted secondary or an overloaded control circuit — the entire 24V system goes dead: no thermostat display, no contactor pull-in, and no ignition. A blown transformer is frequently the downstream casualty of a shorted thermostat wire, so inspect the low-voltage wiring before replacing.

Specifications

Compatibility

Direct-fit replacement for the ICP WPG4364060LKB1 packaged gas/electric unit and compatible across Tempstar, Heil, and Comfortmaker WPG-series equipment using a 208/230V-to-24V 40VA control transformer. Confirm your existing primary tap matches your incoming line voltage before wiring.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage with a multimeter before handling any wiring.
2. Access — Remove the control / electrical access panel to reach the transformer in the control box.
3. Document — Photograph the primary (line) and secondary (24V) leads and the barrier placement before disconnecting.
4. Remove — Disconnect the primary and secondary leads, remove the mounting screws, and lift out the old transformer and barrier.
5. Install — Mount the new transformer, install the 24V barrier, and reconnect the primary to the correct voltage tap and the secondary to the 24V circuit per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals and a working thermostat call.

Signs You Need a Replacement

• No 24V power — blank thermostat and no system response.
• Contactor and gas valve will not energize on a call.
• Burnt smell or visibly scorched transformer windings.
• Measured 0V on the secondary with correct primary voltage present.

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.