ICP 40VA Transformer for WPA4364000RKB1 — 208/230V to 24V | Ships Today

Overview

This is the OEM control transformer kit (Part #1173691) with barrier/terminal cover (Part #1176144) for the ICP WPA4364000RKB1 unit. The transformer steps line voltage (208/230V) down to the 24-volt control voltage that powers the thermostat, contactor coil, and control board. Without a working transformer, the entire low-voltage control circuit goes dead — the thermostat is blank, the contactor won't pull in, and the system will not start. Transformers typically fail from a shorted secondary, a control wiring fault, or age. The included barrier provides safe separation and strain relief for the 24V terminals.

Specifications

Compatibility

Engineered as the factory replacement for the ICP WPA4364000RKB1 unit and shared across the ICP brand family — Tempstar, Heil, Comfortmaker, Arcoaire, and KeepRite. Confirm your existing transformer is a 40VA, 208/230V primary to 24V secondary before ordering.

Installation Guide

1. Safety First — Disconnect power and verify zero voltage at the transformer primary with a multimeter.
2. Access — Remove the control panel cover.
3. Document — Photograph the primary and secondary wiring before disconnecting.
4. Remove — Disconnect the leads and unbolt the old transformer and barrier.
5. Install — Mount the new transformer and barrier, then wire primary and secondary per your photo.
6. Test — Restore power and confirm 24 VAC across the secondary terminals.

Signs You Need a Replacement

• Blank thermostat with no 24V control power.
• Contactor and control board will not energize.
• Burnt smell or visibly charred transformer body.
• No measurable 24 VAC on the secondary side.

Shipping & Returns

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