ICP Control Transformer 40VA for WTA3422000RKA1 — 208/230V to 24V | Ships Today

Overview

This OEM control transformer (part #1173691) powers the 24V low-voltage control circuit on your ICP/Tempstar/Heil WTA3422000RKA1 system. It steps down 208/230V line voltage to 24V at 40VA, feeding the contactor coil, thermostat, and control board. A failed transformer — from a shorted secondary, sustained overload, or simple age — leaves the entire control circuit dead: the contactor won't engage, the blower and compressor won't start, and the thermostat may go blank. The 40VA Class 2 rating provides reliable headroom for typical residential control loads.

Specifications

Compatibility

Direct OEM replacement for the ICP/Tempstar/Heil WTA3422000RKA1 condensing unit. Also used across ICP-family equipment requiring a 208/230V-to-24V 40VA control transformer. Verify the existing transformer's primary/secondary voltage 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 panel access cover.
3. Document — Photograph all primary and secondary wire connections before disconnecting.
4. Remove — Label and disconnect the primary (line) and secondary (24V) leads, then unbolt the old transformer from its bracket.
5. Install — Mount the new transformer and match the primary leads to incoming line voltage and the secondary leads to the 24V circuit per your photo.
6. Test — Restore power, confirm 24V across the secondary, and verify the contactor energizes on a cooling call.

Signs You Need a Replacement

• No 24V at the control board or thermostat — system completely unresponsive
• Contactor will not pull in on a cooling call
• Repeatedly blown low-voltage fuse or visible burnt/melted housing
• Buzzing transformer or secondary voltage measuring well below 24V

Shipping & Returns

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