ICP 40VA Transformer for WPG4484115RKB1 – 208/230 to 24V | Ships Today

Overview

This OEM control transformer (part number 1173691, with barrier 1178431) steps line voltage down to the 24V control power that runs the thermostat, relays, and safety circuits on your ICP WPG4484115RKB1 system. Rated at 40VA with a 208/230V primary and 24V secondary, it is the heart of the low-voltage control system. When a transformer fails — often from a shorted thermostat wire or a stuck contactor coil — the entire control circuit goes dead. Common symptoms include a blank thermostat, no response on a call for heating or cooling, or a transformer that has overheated and burned out.

Specifications

Compatibility

Direct OEM fit for the ICP / Tempstar / Heil WPG4484115RKB1 unit. Used across ICP-family package units and air handlers requiring a 40VA, 208/230-to-24V control transformer.

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 cover to reach the transformer.
3. Document – Photograph the primary and secondary wire connections before disconnecting.
4. Remove – Disconnect the primary and secondary leads and unbolt the old transformer from its mount.
5. Install – Mount the new transformer, reconnect the correct primary voltage taps and the 24V secondary per your photo.
6. Test – Restore power and confirm 24V at the secondary and normal thermostat operation.

Signs You Need a Replacement

• Blank or unresponsive thermostat
• No 24V control power at the board
• System dead on both heating and cooling calls
• Transformer is burnt, swollen, or smells scorched

Shipping & Returns

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