ICP 40VA Transformer for WPG4424090LKB1 — 208/230V to 24V | Ships Today

Overview

This OEM control transformer (Part No. 1173691, supplied with 24V barrier 1178431) steps the 208/230V line voltage down to the 24V power your ICP WPG4424090LKB1 needs to run its thermostat, control board, contactor coil, and gas valve. Rated at 40VA, it supplies enough current for the full low-voltage circuit. When a transformer fails — from age, a shorted control wire, or an overloaded secondary — the entire 24V system goes dead: no thermostat display, no cooling or heating calls, and an unresponsive unit. Installing the correct OEM transformer restores stable control power across the system.

Specifications

Compatibility

Built for the ICP / Tempstar / Heil WPG4424090LKB1 packaged gas-electric unit and related ICP-family equipment using a 40VA 208/230-to-24V control transformer. Verify primary tap voltage and VA rating against your existing transformer before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and unit disconnect, then verify zero voltage with a multimeter.
2. Access — Remove the control panel to reach the transformer.
3. Document — Photograph the primary (line) and secondary (24V) wiring and any tap selection.
4. Remove — Label and disconnect all leads, then unbolt the old transformer from its bracket.
5. Install — Mount the new transformer, connect the correct primary tap and 24V secondary per your photo, and install the barrier.
6. Test — Restore power and confirm 24V at the secondary and normal thermostat and unit operation.

Signs You Need a Replacement

• Blank thermostat with no low-voltage power
• Unit completely unresponsive to heat or cool calls
• No 24V reading at the transformer secondary
• Burnt smell or visibly scorched transformer housing

Shipping & Returns

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