ICP 40VA Transformer for WPG4604130RKA1 — 208/230V to 24V | Ships Today
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Overview
This OEM transformer kit (part number 1173691, with terminal barrier 1178431) supplies low-voltage control power for the ICP/Tempstar/Heil WPG4604130RKA1. It steps the 208/230V primary down to a 24V, 40VA secondary that powers the control board, contactor coil, thermostat circuit, and gas valve. The included 24V barrier protects and isolates the low-voltage terminals. When a transformer fails — usually from a shorted gas valve, pinched thermostat wire, or contactor coil overload — the entire control system goes dead: no thermostat response, no contactor pull-in, and no ignition. Installing the correct 40VA OEM transformer restores stable, properly rated control voltage to the whole unit.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1173691 (transformer), 1178431 (24V barrier) |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Application | Low-voltage control circuit |
Compatibility
Factory-spec 40VA control transformer for the ICP/Tempstar/Heil WPG4604130RKA1 packaged unit and other WPG-series models using the same 208/230V-to-24V control circuit. Verify VA rating, primary/secondary voltages, and mounting before installing.
Installation Guide
- Safety First — Disconnect power at the unit and main panel, then verify zero voltage at the transformer leads with a multimeter.
- Access — Remove the control-area service panel to reach the transformer and barrier.
- Document — Photo every primary and secondary lead and the barrier position before disconnecting.
- Remove — Disconnect the leads, unbolt the transformer from its bracket, and set the old barrier aside.
- Install — Mount the new transformer, install the 24V barrier, and reconnect primary and secondary leads exactly per your photo.
- Test — Restore power, measure 24V at the secondary, and confirm the thermostat, contactor, and ignition respond.
Signs You Need a Replacement
- No 24V control voltage and a completely unresponsive thermostat.
- Contactor will not pull in and the system will not start.
- Transformer is hot, buzzing loudly, or smells burnt.
- Repeated control-fuse blowing after a downstream short is cleared.
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