ICP Control Board Kit for RHS240L0AA0AAAA — OEM 1183618 Replacement | Ships Today

Overview

This is a genuine OEM control board kit (part number 1183618) for the ICP/Tempstar/Heil RHS240L0AA0AAAA heat pump. The control board manages the defrost cycle, sequences the compressor and reversing valve, monitors the safety switches, and coordinates the system on every thermostat call. When it fails, the unit may stop heating or cooling, lock into or never enter defrost, short-cycle, or flash fault codes. The kit ships with the correct board revision and mounting hardware for a clean, plug-in replacement.

Specifications

Compatibility

Designed as a direct-fit replacement for the ICP/Tempstar/Heil RHS240L0AA0AAAA heat pump and equivalent units built on the same ICP platform sold under the Tempstar, Heil, Comfortmaker and Arcoaire labels. Confirm fitment using OEM part number 1183618.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring.
2. Access — Remove the control-section service panel.
3. Document — Photograph every wire and terminal on the existing board before disconnecting anything.
4. Remove — Label and disconnect each harness, then unclip or unscrew the failed board from its standoffs.
5. Install — Mount the new board on the standoffs and reconnect each harness exactly as photographed.
6. Test — Restore power, run a heating and cooling call, and confirm proper defrost and reversing-valve operation.

Signs You Need a Replacement

• Unit will not start in heat or cool despite a good thermostat call
• System stuck in defrost or never enters defrost in cold weather
• Compressor or reversing valve short-cycles or chatters
• Visible burn marks, corrosion, or a blown trace on the board

Shipping & Returns

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