ICP 40VA Transformer for WAPT484A1 — 208/230V to 24V | Ships Today

Overview

This genuine OEM 40VA control transformer (OEM 1172028) converts 208/230V line voltage to the 24V required by the low-voltage control circuit of the ICP / Tempstar / Heil WAPT484A1 air handler. The 40VA rating supplies enough power to operate the thermostat, control board, relays, and contactor coil at once. When the transformer fails, the 24V side goes completely dead — the thermostat blanks out and the unit will not respond to a call for heating or cooling. The correct OEM 40VA part guarantees matching primary taps and a 24V secondary sized for the original circuit.

Specifications

Compatibility

A direct OEM replacement for the ICP / Tempstar / Heil WAPT484A1 air handler. The identical 1172028 transformer is shared across related ICP-family WAPT units such as the WAPT604A1 and WAPT424A1.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the air-handler control-box panel.
3. Document — Photograph the primary tap and secondary lead positions before disconnecting.
4. Remove — Disconnect the 208/230V primary and 24V secondary leads and unbolt the failed transformer.
5. Install — Mount the new transformer, select the correct primary tap for your supply, and reconnect the 24V secondary per your photo.
6. Test — Restore power and verify 24V at the secondary and a normal control response.

Signs You Need a Replacement

• Dead thermostat / no low-voltage power
• No blower or heat on a valid call
• Frequent transformer burnout from a shorted control wire
• Visible scorching or a burnt smell at the transformer

Shipping & Returns

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