ICP Control Board for WPA4304000RKB1 — OEM Circuit Board | Ships Today
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Overview
This is the genuine OEM control circuit board (part number 1178001) for the ICP/Tempstar/Heil WPA4304000RKB1 condensing unit. The control board is the brain of the outdoor unit — it manages the compressor contactor sequence, monitors the high- and low-pressure safety switches, enforces the anti-short-cycle delay, and processes the thermostat call to coordinate cooling operation. When the board fails, symptoms range from a no-cool condition to erratic cycling, ignored safety inputs, or an outdoor unit that simply will not respond to a call even though 24V control power is present. Boards commonly fail from power surges, lightning, moisture intrusion, or burnt relays and traces after a stuck contactor or shorted control circuit.
Specifications
| Spec | Value |
|---|---|
| OEM Part Number | 1178001 |
| Type | Control Circuit Board |
| Control Voltage | 24 VAC |
| Brand | ICP / Tempstar / Heil |
| Fits Model | WPA4304000RKB1 |
Compatibility
Built as the direct factory replacement for the ICP WPA4304000RKB1 condensing unit and used across ICP-family outdoor units marketed as Tempstar, Heil, Comfortmaker, and Arcoaire. Confirm the printed part number 1178001 and the board's connector and relay layout against your existing board before installing — control boards are model-specific and not interchangeable across platforms.
Installation Guide
- Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
- Access — Remove the electrical access panel to expose the control board.
- Document — Photograph every plug, terminal, and wire color before disconnecting.
- Remove — Unplug each connector, release the board standoffs or mounting screws, and lift the old board out.
- Install — Seat the new board on its standoffs and reconnect every plug and lead exactly per your photo.
- Test — Restore power, call for cooling, and verify the board energizes the contactor and the unit runs normally.
Signs You Need a Replacement
- Outdoor unit will not start despite 24V control power being present.
- Erratic short-cycling or the compressor running without respecting delays.
- Visible burnt relays, scorched traces, or corrosion on the board.
- Safety switches (high/low pressure) are ignored or misread.
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