ICP 40VA Transformer for WPG4304060RKB1 — 208/230 to 24V OEM 1173691 | Ships Today

Overview

This OEM 40VA control transformer (part 1173691, with 24V barrier 1178431) is the direct-fit step-down transformer for the ICP/Tempstar/Heil WPG4304060RKB1 packaged unit. It converts incoming 208/230V line power down to the 24V control voltage that powers the thermostat, control board, gas valve, and contactor coil. When the transformer fails or shorts, the entire low-voltage control circuit goes dead. Symptoms include a blank thermostat, no response on a call for heat or cool, and a blown low-voltage fuse on the control board.

Specifications

Compatibility

Engineered as a factory replacement for the ICP/Tempstar/Heil WPG4304060RKB1 packaged system. Verify primary/secondary voltages and VA rating against parts 1173691 / 1178431 before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
2. Access — Remove the control/service panel.
3. Document — Photograph the primary and secondary wiring before disconnecting.
4. Remove — Label and disconnect the leads, then unbolt the old transformer.
5. Install — Mount the new transformer, match the primary taps to your supply voltage, and reconnect per your photo.
6. Test — Restore power and confirm 24V at the secondary and normal control operation.

Signs You Need a Replacement

• Blank or unresponsive thermostat.
• No 24V control voltage measured at the board.
• Repeatedly blown low-voltage control fuse.
• System won't respond to any call for heat or cool.

Shipping & Returns

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