ICP Transformer for WAPL244A3 — 40VA 208/230V to 24V Step-Down | Ships Today

Overview

This is a genuine OEM 40VA control transformer (part number 1172028) for the ICP/Tempstar/Heil WAPL244A3 air handler. The transformer steps the 208/230V line voltage down to the 24V control voltage that powers your thermostat, contactor coil, relays, and the rest of the low-voltage control circuit. When this component fails the entire control system goes dead even though line voltage is still present. Common failure symptoms include a blank or unresponsive thermostat, a system that will not start, a humming transformer, or a burnt smell at the control board. A shorted 24V circuit or a power surge will often take a transformer out, so always correct the underlying fault before installing the replacement.

Specifications

Compatibility

Engineered as a direct OEM replacement for the ICP/Tempstar/Heil WAPL244A3 air handler. The 1172028 40VA transformer is also used across many related ICP-family air handlers and furnaces that share the same 208/230V-to-24V control architecture. Always confirm your existing transformer is rated 40VA with a 208/230V primary and 24V secondary before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the 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 primary (208/230V) and secondary (24V) leads, then unbolt the failed transformer from its mounting bracket.
5. Install — Mount the new transformer, reconnect the primary and secondary leads exactly per your photo, and confirm tight connections.
6. Test — Restore power, then verify 24V at the secondary terminals and confirm the thermostat and controls energize.

Signs You Need a Replacement

• Thermostat is blank or unresponsive while line voltage is present
• No 24V reading at the secondary terminals
• Transformer is hot, humming, or has a burnt odor
• Repeatedly blown low-voltage fuse or tripped control circuit

Shipping & Returns

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