ICP 40VA Transformer for WAPT304A1 — 208/230V to 24V | Ships Today

Overview

This OEM 40VA control transformer (ICP part #1172028) steps 208/230V line voltage down to the 24V control voltage used by the ICP / Tempstar / Heil WAPT304A1 system. It supplies low-voltage power to the thermostat, contactor coil, control board, and other 24V devices. A failed transformer kills the entire control circuit: the thermostat goes blank, the system ignores heat and cool calls, and contactors and relays will not energize. Common causes are a shorted low-voltage wire, a power surge, or age-related winding breakdown. A genuine 40VA OEM replacement restores dependable 24V control power.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP / Tempstar / Heil WAPT304A1. Confirm the 208/230V primary tap and 40VA rating match your existing transformer before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the control-compartment service panel.
3. Document — Photograph the primary and secondary wiring before disconnecting.
4. Remove — Disconnect all leads and unbolt the failed transformer from the panel.
5. Install — Mount the new transformer and reconnect primary and secondary leads exactly per your photos.
6. Test — Restore power and verify 24V across the secondary terminals.

Signs You Need a Replacement

• No 24V control voltage and a blank thermostat.
• System completely unresponsive to heat or cool calls.
• Contactor or relay coil will not energize.
• Burnt smell or visible scorching on the transformer body.

Shipping & Returns

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