ICP 40VA Transformer for WPG3484090LKC1 — 208/230V to 24V | Ships Today
OEM Guaranteed
Same-Day Ship
30-Day Returns
Secure Checkout
Overview
This genuine OEM control transformer (part number 1173691) steps 208/230 volt line power down to 24 volts at 40 VA for the ICP / Tempstar / Heil model WPG3484090LKC1, and ships with the matching 24V terminal barrier (part number 1178431). The transformer powers the entire low-voltage control circuit — thermostat, contactor coil, gas valve, and control board. When it fails or burns open, the system goes completely dead even though line power is present. Overloaded coils, shorted thermostat wiring, or age can all take a transformer out. Installing the correct 40VA OEM transformer restores the 24V control signal that runs the whole system.
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 | 40 VA |
| Fitment | OEM |
Compatibility
A direct-fit replacement for the ICP, Tempstar, and Heil model WPG3484090LKC1 and related units using a 208/230V primary control circuit. Confirm both the primary tap voltage and the 40VA rating match your original transformer before installing.
Installation Guide
- Safety First — Disconnect power at the breaker, then verify zero voltage with a multimeter on both line and low-voltage sides.
- Access — Remove the service panel to reach the control box.
- Document — Photograph the primary and secondary wiring and the barrier terminal connections before disconnecting.
- Remove — Label and disconnect the primary and 24V leads, then unbolt the old transformer and barrier.
- Install — Mount the new transformer and 24V barrier, wire the 208/230V primary to the correct tap, and connect the 24V secondary per your photo.
- Test — Restore power and confirm 24V across the secondary and that the control circuit energizes.
Signs You Need a Replacement
- System is completely dead with line power present
- No 24V reading across the secondary terminals
- Blown low-voltage fuse or repeatedly tripped control circuit
- Burnt smell or visible scorching on the transformer body
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