ICP Transformer for WCH3604GKA1 — 40VA 24V | Ships Today

Overview

This OEM 40VA control transformer steps line voltage down to the 24V low-voltage power required by the control board, contactor coil, and reversing-valve circuit on ICP Tempstar Heil model WCH3604GKA1 heat pump units. Note: the parts referenced on this model page (1172574 COIL REV VLV 24V and 1175622 VALVE REV W/COIL 24V) are reversing-valve components — verify the correct transformer part number against your unit before ordering. A failed transformer leaves the entire 24V control circuit dead: no thermostat response, no contactor pull-in, and no defrost or reversing-valve operation. Common causes are a shorted coil or fan motor overloading the secondary, a control short, or simple age-related winding failure.

Specifications

Compatibility

Designed for the 24V control system in ICP Tempstar Heil model WCH3604GKA1 and related ICP-family heat pumps. Confirm primary voltage and the 40VA rating match your application.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the control-panel cover.
3. Document — Photograph the primary (line) and secondary (24V) leads before disconnecting.
4. Remove — Disconnect leads, unbolt the transformer from its mounting bracket.
5. Install — Mount the new transformer and reconnect primary and secondary leads per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals with a meter.

Signs You Need a Replacement

• No 24V at the control board or thermostat
• Unit completely unresponsive to thermostat calls
• Repeatedly blown low-voltage fuse
• Burnt smell or visibly charred transformer housing

Shipping & Returns

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