ICP 40VA Transformer for WPG4304060LKA1 — 208/230V to 24V OEM 1173691 | Ships Today

Overview

This genuine OEM 40VA control transformer (part 1173691, supplied with terminal barrier 1178431) powers the 24-volt control circuit on the ICP/Heil/Tempstar WPG4304060LKA1 packaged unit. It steps the incoming 208/230V line voltage down to the 24V needed by the thermostat, control board, contactor coil, gas valve, and pressure switch. Rated at 40VA, it provides the holding current those loads require. When a transformer fails — usually from a shorted control wire or an overloaded coil — the entire low-voltage system goes dead: no thermostat display, no contactor pull-in, and no heating or cooling operation. Replacing a burned-out transformer restores power to the whole control circuit.

Specifications

Compatibility

Direct OEM replacement for the ICP/Heil/Tempstar WPG4304060LKA1 packaged system and related WPG-series units using a 40VA 208/230-to-24V control transformer. Verify your primary tap matches your incoming line voltage before wiring.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the service/control panel to reach the transformer.
3. Document — Photograph every primary and secondary lead before disconnecting.
4. Remove — Disconnect the leads, then unscrew the old transformer from its bracket.
5. Install — Mount the new 1173691 transformer with the 1178431 barrier, then reconnect leads per your photo, matching the correct primary tap.
6. Test — Restore power and confirm 24V across the secondary and normal control operation.

Signs You Need a Replacement

• No 24V output / dead thermostat and control board
• Contactor or gas valve will not energize
• Repeated blown low-voltage fuse
• Visible scorching, melted housing, or a burnt smell at the transformer

Shipping & Returns

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