ICP Transformer for WJA360000K000B1 — 40VA 208/230V to 24V | Ships Today

Overview

This is the genuine OEM low-voltage control transformer for the ICP / Tempstar / Heil WJA360000K000B1 condensing unit. It steps the 208/230V line voltage down to the 24V control circuit that powers the contactor coil, thermostat, and safety switches. Rated at 40VA, it supplies the steady, regulated low-voltage current your system needs to energize controls reliably on every call for cooling. This listing includes both the transformer (OEM part 1173691, TRANS 208/230>24 40VA) and the 24V barrier (OEM part 1176032) that isolates and protects the line- and low-voltage terminals. When a control transformer fails, the entire 24V circuit goes dead — the contactor won't pull in, the unit won't start, and the thermostat may appear unpowered. Common failure causes include a shorted thermostat wire, an overloaded control circuit, voltage spikes, or simple age-related winding breakdown.

Specifications

Compatibility

Direct OEM-fit replacement for the ICP WJA360000K000B1 condensing unit and its sibling builds across the ICP family of brands, including Tempstar, Heil, Comfortmaker, and Arcoaire models that share the same 208/230V control platform. Always confirm the printed VA rating and primary/secondary voltage on your existing transformer before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage at the contactor line terminals with a multimeter.
2. Access — Remove the service/control panel to expose the transformer and barrier.
3. Document — Photograph all primary and secondary wire connections before disconnecting anything.
4. Remove — Label and disconnect the line-voltage primary leads and 24V secondary leads, then unbolt the failed transformer and barrier from the mounting bracket.
5. Install — Mount the new barrier and transformer, then reconnect primary and secondary leads exactly per your photo.
6. Test — Restore power and confirm 24V across the secondary terminals; verify the contactor pulls in on a cooling call.

Signs You Need a Replacement

• No 24V at the control circuit and the contactor will not energize.
• Repeatedly blown control fuse or tripped low-voltage protection.
• Buzzing, overheating, or a burnt smell from the transformer.
• Thermostat goes dead while line voltage is confirmed present.

Shipping & Returns

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