ICP Control Board for WPA3364000RKC1 — OEM Defrost Circuit Board | Ships Today

Overview

This genuine OEM circuit board (OEM 1178001) is the electronic brain of the ICP / Tempstar / Heil WPA3364000RKC1 heat pump. It manages the defrost cycle, monitors temperature and pressure inputs, sequences the compressor and reversing valve, and energizes the 24V control circuit that drives the contactor and other components. On a heat pump, the defrost control board is what keeps the outdoor coil clear of ice in heating mode — when it fails, the unit may lock out, run continuously, ice over, or stop heating and cooling altogether. Installing a genuine OEM board restores correct timing and protects the rest of the system.

Specifications

Compatibility

Direct-fit replacement for the ICP WPA3364000RKC1 heat pump and related Tempstar, Heil, and Comfortmaker units using this control/defrost board. Match the OEM number on your existing board to confirm fitment before installing.

Installation Guide

1. Safety First — Disconnect power and pull the outdoor disconnect; verify zero voltage with a multimeter.
2. Access — Remove the control panel cover.
3. Document — Photograph every connector and wire location on the old board before removing anything.
4. Remove — Unclip the standoffs/screws and disconnect each harness from the failed board.
5. Install — Mount the new board and reconnect every connector exactly per your photo, checking the DIP switch / jumper settings match.
6. Test — Restore power and confirm normal startup, then verify a defrost cycle initiates correctly.

Signs You Need a Replacement

• Outdoor coil ices over and won't defrost
• Compressor or fan won't run despite good power
• Erratic operation, lockouts, or fault codes
• Visible burnt traces, scorching, or corrosion on the board

Shipping & Returns

Ships same day before 3 PM CST. 30-day returns. Backed by the National HVAC Parts fitment guarantee.