ICP 40VA Transformer for WAXL244A2 — 208/230V to 24V | Ships Today

Overview

This is a genuine OEM 40VA control transformer (part number 1172028) for the ICP WAXL244A2 unit. The transformer steps the incoming 208/230-volt line down to the 24-volt control voltage that powers your thermostat, contactor coil, gas valve, and control board. With 40 VA of capacity it supplies enough current to energize multiple low-voltage components at once. When a transformer fails, the entire low-voltage control circuit goes dead — the thermostat screen goes blank, the contactor will not pull in, and the system simply will not start a heating or cooling call. A buzzing, overheated, or visibly scorched transformer is a clear sign the windings have shorted and the part needs replacement.

Specifications

Compatibility

This transformer is the factory replacement for the ICP WAXL244A2 and is shared across many Tempstar, Heil, and Comfortmaker branded units built on the same platform. Always confirm the printed part number 1172028 and the 208/230V-to-24V, 40VA rating against the component currently installed in your equipment before ordering.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage at the transformer terminals with a multimeter.
2. Access — Remove the unit service panel to expose the control box.
3. Document — Photograph all primary and secondary wire connections before disconnecting anything.
4. Remove — Label and disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the failed transformer from its mounting bracket.
5. Install — Mount the new transformer, reconnect the primary leads to the matching line voltage (208/230V) tap and the secondary leads to the 24V circuit per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals and normal system startup.

Signs You Need a Replacement

• Thermostat is blank or unresponsive with no 24V present
• Contactor or gas valve will not energize on a call
• Transformer is hot, buzzing loudly, or smells burnt
• Repeated blown low-voltage fuses tracing back to the transformer

Shipping & Returns

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