ICP Transformer for WAPL184A1 — 40VA 208/230V to 24V | Ships Today

Overview

This is a genuine OEM 40VA control transformer (part number 1172028) for the ICP/Tempstar/Heil WAPL184A1 air handler. It steps the 208/230V line voltage down to the 24V control voltage that powers the thermostat, control board, relays, and contactor coil. A 40VA rating provides the current headroom needed to energize the low-voltage circuit reliably. When a transformer fails — usually from a shorted thermostat wire, a stuck contactor, or simple age — the entire low-voltage side goes dead: no thermostat display, no blower, and no response to a call for heat or cool.

Specifications

Compatibility

Direct factory replacement for the ICP/Tempstar/Heil WAPL184A1 air handler. The 208/230V-to-24V 40VA configuration is common across many ICP units; confirm the part number 1172028 and your primary voltage tap before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the air handler control/service panel.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Disconnect the leads, then unbolt the failed transformer from its mounting bracket.
5. Install — Mount the new transformer, land the 208/230V primary on the correct tap, and reconnect the 24V secondary per your photos.
6. Test — Restore power and confirm 24V across the secondary terminals and normal control operation.

Signs You Need a Replacement

• Blank thermostat and no low-voltage power anywhere in the system.
• No 24V reading across the secondary terminals with line voltage present on the primary.
• Burnt smell, discolored casing, or visibly charred windings.
• Repeated blown low-voltage fuses or a transformer that fails again after a control short is cleared.

Shipping & Returns

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