ICP 40VA Transformer 208/230V to 24V with Barrier for WJA336000KTP0A1 — Ships Today

Overview

This OEM kit pairs the genuine 40VA control transformer (part #1173691) with its matching 24V terminal barrier (part #1176032) for the ICP / Tempstar / Heil WJA336000KTP0A1 system. The transformer steps the incoming 208/230 VAC line voltage down to the 24 VAC low-voltage control signal that powers the thermostat, contactor coil, gas valve, and control board. The barrier provides a safe, organized landing point for the low-voltage connections. A dead transformer is a classic "no power to thermostat / no response from system" failure — when the secondary loses 24V output, nothing in the control circuit will energize.

Specifications

Compatibility

Direct OEM replacement for the control transformer and barrier on the ICP/Tempstar/Heil WJA336000KTP0A1. The 40VA 208/230-to-24V format is shared across many ICP-family furnaces, air handlers, and condensing units. Verify part numbers 1173691 and 1176032 and confirm your primary tap voltage before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage at the transformer primary leads with a multimeter.
2. Access — Remove the control/electrical access panel.
3. Document — Photograph the primary (line) and secondary (24V) wiring and the barrier terminal assignments before disconnecting.
4. Remove — Transfer the leads one at a time, then unbolt the old transformer and barrier from the cabinet.
5. Install — Mount the new transformer and barrier, reconnect the primary tap matching your line voltage, and land the 24V leads per your photo.
6. Test — Restore power, confirm 24 VAC across the secondary, and verify the thermostat and controls respond.

Signs You Need a Replacement

• Blank thermostat or no response from the system.
• No 24 VAC measured across the transformer secondary.
• Repeatedly blown low-voltage fuse or burnt-smelling transformer.
• Contactor and gas valve fail to energize despite line power present.

Shipping & Returns

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