Heil 40VA Transformer for WPG3604130RKC1 — 208/230V to 24V w/ Barrier | Ships Today
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Overview
This is the genuine OEM control transformer kit for the ICP/Tempstar/Heil model WPG3604130RKC1, including the 40VA transformer (Part No. 1173691) and its 24V terminal barrier (Part No. 1178431). The transformer steps the unit's 208/230-volt primary line voltage down to the 24-volt secondary that powers the control board, thermostat, contactor coil, gas valve, and other low-voltage components. Rated at 40VA, it supplies enough capacity for the full low-voltage control circuit. When a transformer fails — usually from a shorted secondary wire or an overloaded control circuit — the entire 24V system goes dead. Symptoms include a blank thermostat, no response to heat or cool calls, a tripped low-voltage fuse, or a transformer that is hot, buzzing, or visibly burned.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1173691 (Transformer), 1178431 (24V Barrier) |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Capacity | 40 VA |
| Primary Voltage | 208/230 VAC |
| Secondary Voltage | 24 VAC |
Compatibility
Engineered as the OEM replacement for ICP/Tempstar/Heil model WPG3604130RKC1. This 40VA 208/230V-to-24V transformer is used across many furnaces, air handlers, and package units in the same brand family. Confirm the part number, VA rating, and primary voltage against your existing transformer before ordering.
Installation Guide
- Safety First — Disconnect power at the breaker and unit disconnect, then verify zero voltage with a multimeter.
- Access — Remove the electrical/control access panel.
- Document — Photograph the primary and secondary wiring and barrier terminals before disconnecting.
- Remove — Disconnect the line-voltage primary leads and 24V secondary leads, then unbolt the old transformer.
- Install — Mount the new transformer and barrier, matching the primary tap to your supply voltage, and reconnect each lead per your photo.
- Test — Restore power and verify a steady 24 VAC at the secondary and normal thermostat and control operation.
Signs You Need a Replacement
- Blank thermostat and no 24V control power
- System won't respond to any heat or cool call
- Repeatedly blown low-voltage fuse
- Transformer is buzzing, overheating, or visibly burned
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