ICP 40VA Transformer for WJA324000KTP0B1 — 208/230V to 24V Control | Ships Today

Overview

This OEM control transformer (part number 1173691) steps the 208/230V line voltage down to the 24V control voltage that powers the ICP WJA324000KTP0B1's contactor coil, thermostat circuit, and safety controls. Rated at 40VA, it supplies enough current for the full low-voltage load without overheating. The kit includes the matching terminal barrier (part number 1176032) that isolates the high-voltage primary connections for safe, code-compliant wiring. When a transformer fails — usually from a shorted control circuit or age — the entire 24V system goes dead: no contactor pull-in, no cooling, and often a blown low-voltage fuse. Replacing it with the correct OEM 40VA unit restores reliable control power.

Specifications

Compatibility

Direct OEM replacement for the ICP WJA324000KTP0B1 and matching Heil, Tempstar, and Comfortmaker units that use a 40VA 208/230-to-24V control transformer. Confirm the primary voltage and VA rating against your original before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and verify zero voltage on the primary leads with a multimeter.
2. Access — Remove the control panel cover to reach the transformer.
3. Document — Photograph the primary (line) and secondary (24V) wiring and the barrier placement.
4. Remove — Disconnect the leads, install the new barrier, and unbolt the failed transformer.
5. Install — Mount the new transformer, land the 208/230V primary and 24V secondary per your photo, and seat the barrier.
6. Test — Restore power and confirm a steady 24V at the secondary and proper contactor pull-in on a call.

Signs You Need a Replacement

• No 24V control power — contactor won't energize
• Repeatedly blown low-voltage fuse
• Transformer is hot, buzzing, or smells burnt
• No reading on the 24V secondary terminals

Shipping & Returns

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