ICP Control Board Kit for RHH036K0XA0AAAA — OEM Defrost Board | Ships Today

Overview

This OEM control board kit (part #1183618) is the electronic brain of the ICP/Tempstar/Heil RHH036K0XA0AAAA heat pump. It manages the defrost cycle, reversing valve timing, compressor and fan staging, and the safety lockouts that protect the system. Supplied as a complete kit, it includes the board and the mounting hardware needed for a clean swap. A failed control board can leave a heat pump iced over in winter, stuck in defrost, unresponsive to thermostat calls, or cycling erratically. Because it coordinates every major component, a faulty board often produces symptoms that mimic other failures — replacing it restores correct defrost timing and reliable changeover between heating and cooling.

Specifications

Compatibility

Designed for the ICP/Tempstar/Heil RHH036K0XA0AAAA heat pump and matching platform units across the Comfortmaker and Carrier-built family. Match the board's part number and connector layout to your existing board before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker; verify zero voltage with a multimeter.
2. Access — Remove the control compartment panel.
3. Document — Photograph every plug and wire on the existing board.
4. Remove — Unclip the connectors, remove the mounting screws, and lift out the old board.
5. Install — Mount the new board with the included hardware and reconnect each harness per your photo.
6. Test — Restore power and verify heating, cooling, and a defrost cycle.

Signs You Need a Replacement

• Heat pump freezes over or won't defrost
• No response to thermostat calls
• System stuck in one mode or cycling randomly
• Reversing valve fails to change over

Shipping & Returns

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