ICP Control Board Kit for RHS240H0FA0AAAA — OEM 1183618 | Ships Today

Overview

This is the genuine OEM control board kit (part number 1183618) for the ICP / Tempstar / Heil RHS240H0FA0AAAA heat pump. The control board is the brain of the outdoor unit — it manages the defrost cycle, sequences the compressor and reversing valve, controls the condenser fan, and runs built-in safety and timing logic. A failed board is a frequent cause of a heat pump that won't defrost, won't switch modes, short-cycles, or fails to respond to the thermostat at all. This kit ships as the complete factory assembly so the replacement drops in with the correct firmware, connectors, and mounting for the RHS240 platform.

Specifications

Compatibility

Direct OEM replacement kit for the ICP-built RHS240H0FA0AAAA heat pump and related RHS240 series condensers under the Tempstar, Heil, and Comfortmaker brands. Confirm the board part number 1183618 against your existing board before installing.

Installation Guide

1. Safety First — Disconnect power at the outdoor disconnect and verify zero voltage with a multimeter before opening the control box.
2. Access — Remove the condenser service/control panel to expose the board.
3. Document — Photograph every connector, plug, and wire position on the old board before unplugging.
4. Remove — Unplug each harness, release the board standoffs/screws, and lift out the failed board.
5. Install — Mount the new 1183618 board and reconnect each harness exactly per your photos and the kit instructions.
6. Test — Restore power and verify proper startup, mode changes, and a clean defrost cycle.

Signs You Need a Replacement

• Heat pump will not enter or exit defrost
• No response to thermostat calls despite good 24V supply
• Short-cycling, stuck mode, or erratic outdoor operation
• Visible burnt traces, scorched relays, or a failed diagnostic LED code

Shipping & Returns

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