ICP 40VA Transformer for WPG3304060LKC1 — 208/230V to 24V | Ships Today
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Overview
This genuine ICP control transformer (OEM 1173691, supplied with terminal barrier 1178431) steps the incoming 208/230V line voltage down to the 24V control power that runs the thermostat, control board, gas valve, contactor coil, and safety circuits on your ICP / Tempstar / Heil WPG3304060LKC1 package gas-electric unit. Rated at 40VA, it delivers the steady low-voltage supply the entire control system depends on. When a transformer fails — usually from a shorted low-voltage wire, a stuck contactor coil, or simple age — the unit goes completely dead with no thermostat display, no ignition, and no cooling. A blown internal fuse link, a buzzing or overheated transformer body, or measured 0V on the 24V secondary all point to replacement. The included 24V barrier keeps the secondary terminals safely separated and properly insulated.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1173691 (transformer), 1178431 (24V barrier) |
| Type | Control / Step-Down Transformer |
| Brand | ICP (Tempstar / Heil) |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
Compatibility
Direct OEM replacement for the ICP / Tempstar / Heil WPG3304060LKC1 package gas-electric unit and related WPG-series models that use the 1173691 40VA transformer with the 1178431 barrier. Verify your primary tap voltage (208 vs. 230) and the VA rating before installing.
Installation Guide
- Safety First — Disconnect power at the unit and verify zero voltage with a multimeter on both line and low-voltage terminals.
- Access — Remove the control-area service panel to reach the transformer mounting plate.
- Document — Photograph every primary and secondary wire and the barrier placement before disconnecting.
- Remove — Disconnect the line-voltage primary leads and the 24V secondary leads, then unbolt the failed transformer.
- Install — Mount the new transformer, fit the 24V barrier, and reconnect primary and secondary wiring exactly per your photo.
- Test — Restore power and confirm 24V on the secondary, then verify the thermostat, board, and contactor energize normally.
Signs You Need a Replacement
- Unit is completely dead — no thermostat display, no ignition, no cooling
- 0V measured on the 24V secondary with line voltage present
- Transformer body is buzzing, swollen, or hot to the touch
- Repeatedly blown low-voltage fuse after a control short
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