ICP Transformer for WPA4424000RKA1 — 40VA 208/230V to 24V | Ships Today

Overview

This OEM control transformer (part number 1173691) steps the 208/230V line voltage down to the 24V control voltage that powers the thermostat, contactor coil, and control board in your ICP WPA4424000RKA1 system. It is rated at 40VA, providing ample capacity for the unit's low-voltage circuit. The kit also includes the OEM terminal barrier (part number 1176148, 24V 42-60) that protects and organizes the secondary connections. A blown or shorted transformer is a classic cause of a completely dead control system — no thermostat display, no contactor pull-in, and no response to a cooling call — often triggered by a shorted thermostat wire or a failed downstream component.

Specifications

Compatibility

Direct-fit OEM replacement for the ICP/Heil/Tempstar/Comfortmaker WPA4424000RKA1 and related units using a 40VA 208/230-to-24V control transformer. Confirm primary voltage, VA rating, and mounting before installing.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage at the transformer primary with a multimeter.
2. Access — Remove the service panel to reach the control box.
3. Document — Photograph the primary and secondary wiring and the barrier terminal layout.
4. Remove — Disconnect the leads, then unbolt the old transformer and barrier from the panel.
5. Install — Mount the new transformer and barrier, then reconnect the 208/230V primary and 24V secondary per your photo.
6. Test — Restore power and verify 24V across the secondary and proper control operation.

Signs You Need a Replacement

• Completely dead thermostat or control system with line voltage present.
• No 24V reading across the secondary terminals.
• Burnt smell, scorching, or visible swelling on the transformer body.
• Repeatedly blown low-voltage fuse after the short is cleared.

Shipping & Returns

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