ICP 40VA Transformer for WPA4424000RKB1 — 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) with its matching terminal barrier (part number 1176148) is a 40VA step-down transformer that converts 208/230V line power to the 24V control voltage used by the ICP/Tempstar/Heil model WPA4424000RKB1. Virtually every low-voltage component in the system — the contactor coil, control board, defrost board, and thermostat circuit — depends on this clean 24V supply. When a transformer fails, usually from a shorted secondary or a power surge, the entire control circuit goes dead: the thermostat screen may blank, the contactor will not pull in, and the unit will not respond to a call for cooling. The included 24V barrier (42-60) keeps the secondary terminals safely separated and properly mounted.
Specifications
| Spec | Value |
|---|---|
| Part Numbers | 1173691 (Transformer), 1176148 (24V Barrier) |
| Type | Step-Down Control Transformer |
| Brand | ICP / Tempstar / Heil |
| Rating | 40 VA |
| Primary Voltage | 208/230V |
| Secondary Voltage | 24V |
| Fits Model | WPA4424000RKB1 |
Compatibility
Built for the ICP, Tempstar, Heil, and Comfortmaker unit WPA4424000RKB1, and a direct OEM replacement for transformer 1173691 and barrier 1176148. Confirm the VA rating and primary/secondary voltages match your existing transformer before installing.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the electrical-compartment service panel.
- Document — Photograph the primary and secondary leads and their terminals before disconnecting.
- Remove — Disconnect the line and 24V leads, then unbolt the failed transformer and barrier from the panel.
- Install — Mount the new transformer and barrier, matching primary taps to your supply voltage and reconnecting per your photo.
- Test — Restore power and verify 24V (24-28VAC) across the secondary terminals.
Signs You Need a Replacement
- No 24V at the control board or thermostat (blank thermostat).
- Contactor coil will not energize on a call for cooling.
- Burnt smell or visible scorching on the transformer body.
- Repeatedly blown low-voltage fuse after a 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