ICP 40VA Transformer for WAPM364A1 — 208/230V to 24V Primary | Ships Today

Overview

This OEM 40VA control transformer (part number 1172028) provides the low-voltage power for your ICP WAPM364A1 air handler. It steps down 208/230V line voltage to the 24V control voltage that drives the thermostat, blower control board, and contactor coil. The 40VA rating delivers enough current to run the control circuit without overheating. When a transformer fails, the whole low-voltage system shuts down — the thermostat goes blank, the blower won't energize, and the system ignores every heating and cooling call. Common causes are a shorted secondary circuit, a seized contactor coil drawing too much current, or age-related winding failure.

Specifications

Compatibility

A direct OEM replacement for the ICP WAPM364A1 air handler. ICP equipment is also marketed under the Tempstar, Heil, Comfortmaker, and Arcoaire labels, so this transformer fits equivalent models across those brand families that specify part 1172028.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage at the unit with a multimeter before touching any wiring.
2. Access — Remove the service panel to expose the control compartment.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Unscrew the transformer mounting bracket, then disconnect the primary (line) and secondary (24V) leads.
5. Install — Mount the new transformer, reconnect leads per your photo, and confirm the primary tap matches your supply voltage.
6. Test — Restore power and verify 24V across the secondary terminals and that the control system energizes.

Signs You Need a Replacement

• Blank thermostat or no control power
• No response to heating or cooling calls
• Blower and contactor fail to energize
• Burnt smell or visible scorching on the transformer housing

Shipping & Returns

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