ICP Control Board Kit for RHS150L0CA0AAAA — 24V Integrated Board | Ships Today

Overview

This OEM control board kit (part 1183618) is the main control board for the ICP / Heil / Tempstar RHS150L0CA0AAAA heat pump. It runs the 24V control circuit, sequences the compressor and condenser fan, and manages defrost timing so the unit heats and cools correctly. A failed board can leave the system unresponsive to the thermostat, running nonstop, unable to enter or exit defrost, or locked out on a fault. Common failure evidence includes burnt relays, scorched traces, or a board that won't power up. Installing the genuine OEM 1183618 kit restores proper timing and protection instead of just clearing a symptom.

Specifications

Compatibility

Direct-fit replacement for the ICP / Heil / Tempstar RHS150L0CA0AAAA heat pump and related RHS150-series units that shipped with the 1183618 control board kit. Confirm your current 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 at the board line terminals.
2. Access — Remove the control/service panel to expose the board.
3. Document — Photograph every wire and connector before disconnecting.
4. Remove — Unplug the low-voltage harness, sensor leads, and high-voltage terminals, then unsnap or unscrew the old board from its standoffs.
5. Install — Mount the new 1183618 board and reconnect each lead exactly as photographed.
6. Test — Restore power, call for heat and cool, and verify correct staging, fan operation, and defrost.

Signs You Need a Replacement

• Unit ignores thermostat calls or runs continuously.
• Heat pump won't enter or exit defrost correctly.
• Burnt relays, scorched traces, or a dead board with no LED.
• Random lockouts or erratic compressor/fan cycling.

Shipping & Returns

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