ICP Transformer for WAPL424A1 — 208/230V to 24V 40VA | Ships Today

Overview

This OEM control transformer (part #1172028) steps 208/230V line voltage down to 24V to power the low-voltage control circuit on your ICP WAPL424A1 system. Rated at 40VA, it supplies the contactor coil, control board, thermostat, and other 24V loads. A failed transformer takes the entire control circuit offline — the system ignores the thermostat, the contactor never pulls in, and the unit seems dead despite live line power. Overloaded or shorted transformers often show a scorched casing or give off a burnt smell.

Specifications

Compatibility

A direct OEM replacement for the ICP WAPL424A1 and equivalent Tempstar, Heil, Day & Night, Comfortmaker, KeepRite, and Arcoaire systems using a 208/230V-to-24V 40VA control transformer. Verify your existing unit's primary/secondary voltage and VA rating before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the service panel to expose the control compartment.
3. Document — Photograph all primary and secondary connections before disconnecting.
4. Remove — Disconnect the line-voltage primary and 24V secondary leads, then unbolt the old transformer from its bracket.
5. Install — Mount the new transformer, matching the 208/230V taps to line and the 24V leads to the control circuit per your photo.
6. Test — Restore power, confirm 24V at the secondary, and verify the system starts normally.

Signs You Need a Replacement

• System completely unresponsive to the thermostat with line power confirmed.
• No 24V output at the secondary terminals.
• Scorched, swollen, or melted transformer housing.
• Burnt electrical odor in the control compartment.

Shipping & Returns

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