ICP Control Transformer for WAPT184A1 — 40VA 208/230V to 24V | Ships Today

Overview

This is a genuine OEM 40VA control transformer (part number 1172028) for the ICP/Tempstar/Heil WAPT184A1 system. It steps down line voltage of 208/230V to the 24V control circuit that powers the thermostat, contactor coil, control board, and safety switches. When a transformer fails, the entire low-voltage control system goes dead — a blank thermostat, a unit that won't start despite having line power, or a tripped low-voltage circuit are the classic symptoms. Rated at 40VA, this transformer supplies enough current for standard residential control loads.

Specifications

Compatibility

Designed for the ICP/Tempstar/Heil WAPT184A1 and other compatible ICP-family air handlers and heat pump systems using a 208/230V to 24V control circuit. Always confirm your existing transformer's VA and voltage ratings before replacing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the unit's service panel to expose the control compartment.
3. Document — Photograph all primary and secondary wire connections before disconnecting anything.
4. Remove — Disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the failed transformer from its mounting bracket.
5. Install — Mount the new transformer, reconnect primary to line voltage and secondary to the 24V control circuit exactly per your photo.
6. Test — Restore power and verify 24V across the secondary terminals and that the thermostat and contactor energize.

Signs You Need a Replacement

• Blank or dead thermostat with line power present
• No 24V reading across the secondary terminals
• Repeatedly blown low-voltage fuse or tripped control circuit
• Burnt smell or visible scorching on the transformer body

Shipping & Returns

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