ICP 40VA Transformer for WPG4244060LKB1 — 208/230V to 24V Control | Ships Today

Overview

This OEM 40VA control transformer (OEM part number 1173691, with 24V barrier 1178431) steps the unit's 208/230V line power down to the 24V low-voltage control circuit on the ICP / Tempstar / Heil WPG4244060LKB1 packaged gas unit. Every 24V control device — the integrated board, gas valve, contactor coil, and thermostat — depends on this transformer. When it fails, the entire control side goes dead: no thermostat display power, no cooling, no heating, and the unit appears completely unresponsive even though line voltage is present. Transformers typically fail from a low-voltage short, an overloaded secondary, or simple age-related winding breakdown, often blowing the unit's low-voltage fuse in the process.

Specifications

Compatibility

Direct OEM fit for the ICP WPG4244060LKB1 packaged gas/electric unit and shared-platform Tempstar, Heil, and Comfortmaker WPG-series systems using the 40VA 208/230-to-24V transformer 1173691. Verify primary voltage tap and VA rating against your existing transformer before wiring.

Installation Guide

1. Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
2. Access — Remove the control compartment panel.
3. Document — Photograph the primary (line) and secondary (24V) lead connections and the barrier placement.
4. Remove — Label and disconnect the primary and secondary leads, then unbolt the old transformer from the control plate.
5. Install — Mount the new transformer with its 24V barrier, connect the correct primary tap for your supply voltage, and wire the 24V secondary per your photo.
6. Test — Restore power, measure ~24–28VAC across the secondary, and confirm the thermostat, heating, and cooling all respond.

Signs You Need a Replacement

• No 24V control power — blank thermostat, no heating or cooling.
• Repeatedly blown low-voltage fuse on the control board.
• No measurable voltage across the transformer secondary.
• Burnt smell, discoloration, or buzzing from the transformer.

Shipping & Returns

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