ICP Transformer 40VA for WPA4364000RKA1 — 208/230V to 24V | Ships Today

Overview

This OEM control transformer (part #1173691) steps 208/230V line voltage down to the 24V control power that runs the thermostat, contactor coil, and control board on your ICP WPA4364000RKA1 unit. Rated at 40VA, it supplies the low-voltage circuit the entire system depends on. This listing includes the matching 24V terminal barrier (part #1176144) for safe, code-correct field connections. When a transformer fails — usually from a shorted 24V circuit or age — the thermostat goes dark and nothing responds, even though line voltage is present. Telltale signs are no 24V output, a blown low-voltage fuse that keeps recurring, a burnt smell, or a transformer that buzzes loudly and runs hot.

Specifications

Compatibility

Direct-fit replacement for the ICP WPA4364000RKA1 unit and compatible Heil, Tempstar, and Comfortmaker systems using a 40VA 208/230V-to-24V control transformer. Confirm your primary voltage tap (208 vs 230) and VA rating before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the control/access panel to reach the transformer.
3. Document — Photograph the primary and secondary leads and note which voltage tap is in use.
4. Remove — Disconnect the primary and 24V secondary leads and unbolt the old transformer; install the barrier for the 24V connections.
5. Install — Mount the new transformer, land the primary on the correct voltage tap, and wire the 24V secondary per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals and a live thermostat.

Signs You Need a Replacement

• Thermostat is dead with line voltage present
• No 24V output at the secondary terminals
• Repeatedly blown low-voltage fuse
• Loud buzzing, overheating, or a burnt smell at the transformer

Shipping & Returns

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