ICP Transformer for WAXT304A2 — 208/230V to 24V 40VA | Ships Today

Overview

This OEM control transformer (part number 1172028) converts the 208/230V line supply on your ICP WAXT304A2 down to the 24V control voltage required by the thermostat, contactor coils, and relays. Its 40VA rating provides the capacity needed for the unit's full low-voltage control circuit. Transformers fail from shorted control wiring, a stuck contactor, voltage surges, or worn windings — and when one goes, the system stops responding entirely even with high-voltage power present. Replacing it restores 24V control power and brings the system back online.

Specifications

Compatibility

Directly fits the ICP/Tempstar/Heil WAXT304A2 and related WAXT-series systems that specify the 1172028 transformer. Verify your existing unit is a 208/230V-to-24V 40VA transformer before replacing.

Installation Guide

1. Safety First — Disconnect power at the breaker and disconnect, then verify zero voltage with a multimeter.
2. Access — Remove the service panel to reach the control box.
3. Document — Photograph all primary and secondary wiring before disconnecting.
4. Remove — Label and disconnect the line-voltage primary leads and 24V secondary leads, then unbolt the failed transformer.
5. Install — Mount the new transformer, reconnect leads per your photo, and match the 208/230V tap to your supply.
6. Test — Restore power and confirm 24V on the secondary and normal system operation.

Signs You Need a Replacement

• No cooling or heating response despite line power at the unit
• Zero 24V reading across the secondary terminals
• Recurring blown low-voltage fuse
• Burnt odor, scorched case, or melted potting on the transformer

Shipping & Returns

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