ICP Transformer for WPG3484130LKC1 — 208/230V to 24V 40VA | Ships Today
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Overview
This OEM transformer (part #1173691) steps down 208/230V line voltage to the 24V control voltage that powers your ICP Tempstar Heil WPG3484130LKC1 furnace's thermostat, control board, gas valve, and relays. Rated at 40VA, it supplies enough power for the full low-voltage circuit. When a transformer fails, the entire 24V control system goes dead — the thermostat screen blanks, the blower and ignition won't energize, and the system appears completely unresponsive even though 230V line power is present. This listing also includes the 24V barrier (part #1178431) that protects and isolates the low-voltage wiring at the transformer.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1173691 (Transformer), 1178431 (24V Barrier) |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Rating | 40VA |
Compatibility
Engineered for the ICP Tempstar Heil WPG3484130LKC1 and other ICP-family packaged and split units that use a 208/230V primary, 24V secondary, 40VA control transformer. Always match the primary and secondary voltage and VA rating to your existing unit before installing.
Installation Guide
- Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
- Access — Remove the unit's service/control panel to expose the transformer.
- Document — Photograph all primary and secondary wire connections before disconnecting.
- Remove — Label and disconnect the leads, then unbolt the old transformer from its mounting bracket.
- Install — Mount the new transformer, reconnect primary (line) and secondary (24V) leads exactly per your photo, and reinstall the barrier.
- Test — Restore power and confirm 24V across the secondary terminals and that the control system energizes.
Signs You Need a Replacement
- Dead thermostat or blank display with line power present
- No 24V reading across the secondary terminals
- Repeatedly blown low-voltage fuse or control fuse
- Burnt smell or visibly scorched transformer housing
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