ICP 40VA Transformer for WPG4604130LKA1 — 208/230V to 24V | Ships Today
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Overview
This OEM control transformer (part 1173691, "Trans 208/230>24 40VA") supplies the 24V low-voltage power for the ICP Tempstar/Heil WPG4604130LKA1 packaged unit, and includes the matching 24V barrier/terminal component (part 1178431). It steps the unit's 208/230V line voltage down to the 24V control circuit that runs the thermostat, control board, contactor coil, gas valve, and relays. When a transformer fails — often from a shorted control wire or a stuck contactor coil overloading it — the entire low-voltage system goes dead: no thermostat display, no cooling or heating call, and no contactor pull-in. A blown internal fuse, scorched windings, or a burnt smell are common indicators. This 40VA factory-spec replacement restores control power across the system.
Specifications
| Spec | Value |
|---|---|
| Part Number | 1173691 (transformer) / 1178431 (24V barrier) |
| Type | Step-Down Control Transformer |
| Brand | ICP (Tempstar / Heil) |
| Rating | 40 VA |
| Voltage | 208/230V primary, 24V secondary |
| Fits Model | WPG4604130LKA1 |
Compatibility
Built for the ICP/Tempstar/Heil WPG4604130LKA1 packaged gas/electric unit and related WPG-series systems using a 40VA 208/230-to-24V transformer. Verify primary voltage tap, VA rating, and secondary voltage against your existing part before installing.
Installation Guide
- Safety First — Disconnect power and verify zero voltage with a multimeter at the transformer terminals.
- Access — Remove the control-panel service cover.
- Document — Photograph the primary and secondary wiring and the correct voltage tap.
- Remove — Label and disconnect the leads, then unbolt the transformer and barrier from the panel.
- Install — Mount the new transformer, land the primary on the matching voltage tap, and reconnect the 24V secondary per your photo.
- Test — Restore power and confirm 24V at the secondary and normal thermostat/control operation.
Signs You Need a Replacement
- Blank thermostat with no low-voltage power.
- No response to heating or cooling calls.
- Contactor or gas valve will not energize.
- Burnt smell, scorched windings, or blown control fuse.
Shipping & Returns
Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.
Shipping Information
- Orders placed before 3PM CST ship same business day
- Standard delivery: 2-5 business days
- Express shipping available at checkout
- Free shipping on orders over $75
- Tracking number emailed upon shipment
Return Policy
- 30-day returns on unused parts in original packaging
- Electrical parts (capacitors, contactors, control boards) are final sale once installed
- Email info@nationalhvacparts.com to initiate a return
- Refunds processed within 5-7 business days