ICP 40VA Transformer for WPG3304040RKC1 — OEM 208/230V to 24V Control Transformer | Ships Today

Overview

This genuine OEM control transformer (OEM #1173691) steps 208/230V line power down to 24V to power the low-voltage control circuit on the ICP/Tempstar/Heil WPG3304040RKC1 package gas unit, and ships with the matching 24V barrier (OEM #1178431). Rated at 40VA, it supplies the thermostat, control board, gas valve, and relays. When a transformer fails — usually from a shorted secondary, voltage spike, or overload — the entire low-voltage system goes dead: no thermostat display, no call for heat or cool, and no 24V at the control board. Installing the correct OEM 40VA transformer restores reliable control power.

Specifications

Compatibility

Direct fit for the ICP/Tempstar/Heil WPG3304040RKC1 package gas/electric unit and related WPG-series models using the 1173691 transformer with the 1178431 barrier. Confirm your primary voltage tap before ordering.

Installation Guide

1. Safety First — Disconnect power at the unit disconnect and verify zero voltage with a multimeter.
2. Access — Remove the control compartment service panel.
3. Document — Photo every primary and secondary lead and the barrier placement before disconnecting.
4. Remove — Disconnect the leads, remove the mounting screws, and lift out the failed transformer.
5. Install — Mount the new transformer and barrier, then reconnect the 208/230V primary and 24V secondary leads per your photos.
6. Test — Restore power and confirm 24V at the secondary and at the control board.

Signs You Need a Replacement

• Blank thermostat or no 24V control power
• No response to heat or cool calls
• Repeatedly blown low-voltage fuse
• Buzzing, burnt-smelling, or visibly scorched transformer

Shipping & Returns

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