ICP Control Board Kit for RHS243L0AA0AAAA — 24V Defrost Control | Ships Today

Overview

This OEM Control Board Kit (Part No. 1183618) is the electronic control center for the ICP / Tempstar / Heil RHS243L0AA0AAAA heat pump. It governs the defrost cycle, reads temperature and pressure inputs, and sequences the compressor contactor and reversing valve on a 24V circuit. A failed board can leave the unit running endlessly in defrost, unable to switch between heating and cooling, short-cycling the compressor, or unresponsive to thermostat calls. Installing the factory board kit restores correct timing and built-in protective logic.

Specifications

Compatibility

Designed for the ICP RHS243L0AA0AAAA heat pump and shared across the RHS243 platform sold under the ICP, Tempstar, Heil, and Comfortmaker brands. Confirm your unit's data-plate model and the existing board's part number before ordering.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the control-panel service cover on the condensing unit.
3. Document — Photograph every wire and connector on the old board before disconnecting.
4. Remove — Unplug the low-voltage harness and line connections, release the standoffs, and lift out the failed board.
5. Install — Seat the new board on the standoffs and reconnect each wire exactly per your photos.
6. Test — Restore power, run a heating and a cooling call, and confirm a normal defrost cycle.

Signs You Need a Replacement

• Unit stuck in defrost or never defrosts
• No response to thermostat heat/cool calls
• Compressor short-cycling or failing to start
• Burnt, scorched, or swollen components on the board

Shipping & Returns

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