ICP Transformer for WPG4604115LKA1 — 40VA 208/230V to 24V | Ships Today

Overview

This OEM 40VA control transformer (part 1173691, supplied with barrier 1178431) provides the 24V control power for the ICP Tempstar Heil WPG4604115LKA1 packaged unit. It steps the 208/230V line voltage down to the 24V needed to run the thermostat circuit, control board, contactor coil, gas valve, and inducer relays. At 40VA it delivers ample capacity for the unit's combined control loads. When a transformer fails — usually from a shorted secondary or an overloaded control circuit — the entire low-voltage system goes dead: no thermostat response, no contactor pull-in, and no ignition sequence.

Specifications

Compatibility

Designed for the ICP Tempstar Heil WPG4604115LKA1 packaged unit and related ICP-family equipment using a 208/230V-to-24V 40VA transformer. Confirm your primary tap voltage and the 1173691 part number before installing.

Installation Guide

1. Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
2. Access — Remove the service/control panel to reach the transformer and barrier.
3. Document — Photograph every primary and secondary lead, noting the voltage tap in use (208 vs 230).
4. Remove — Disconnect the leads, remove the mounting screws, and lift out the old transformer.
5. Install — Mount the new transformer, land the primary on the matching voltage tap, and reconnect the 24V secondary per your photo.
6. Test — Restore power and confirm a steady 24V across the secondary with the control circuit energized.

Signs You Need a Replacement

• No 24V at the thermostat or control board
• Contactor and gas valve will not energize
• Blown low-voltage fuse that re-blows immediately
• Burnt smell or visible scorching on the transformer body

Shipping & Returns

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