ICP Transformer for WAHL484B1 — 40VA 208/230V to 24V | Ships Today

Overview

This OEM control transformer (part number 1172028) provides the 24V power that runs the low-voltage control circuit in your ICP/Tempstar/Heil model WAHL484B1 system. It converts a 208/230V primary to a 24V, 40VA secondary feeding the thermostat, contactor, relays, and control board. When the transformer fails the control system goes completely dead — a blank thermostat, a contactor that never closes, and a system that will not start. Shorted secondary wiring, an overloaded control circuit, or aging windings are the usual culprits.

Specifications

Compatibility

Direct-fit replacement for ICP, Tempstar, Heil, Comfortmaker, and related International Comfort Products equipment using model WAHL484B1. This 40VA 208/230V-to-24V transformer is common across many ICP air handlers and furnaces — confirm the VA and voltage of your current part before ordering.

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 service panel to expose the control compartment.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Disconnect the primary (line) and secondary (24V) leads, then unbolt the failed transformer from its bracket.
5. Install — Mount the new transformer, match the primary taps to your supply voltage, and reconnect the secondary leads per your photo.
6. Test — Restore power and verify 24V across the secondary terminals and normal operation.

Signs You Need a Replacement

• Dead thermostat with no 24V control power.
• Contactor or relays fail to energize on a call for heat or cool.
• Control fuse blows repeatedly or the transformer smells burnt.
• No voltage reading across the 24V secondary terminals.

Shipping & Returns

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