ICP Control Board Kit for RHS240L0FA0AAAA — OEM 1183618 | Ships Today

Overview

This is the genuine OEM control board kit (part number 1183618) for the ICP / Tempstar / Heil RHS240L0FA0AAAA 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 protects the system with built-in timing and lockout logic. When the board fails, the heat pump can stop defrosting (allowing ice to build on the coil), fail to switch between heating and cooling, short-cycle, or stop responding to the thermostat entirely. The kit ships with the mounting hardware and connectors needed for a clean replacement.

Specifications

Compatibility

Designed for the ICP RHS240L0FA0AAAA heat pump and the shared Tempstar, Heil, and Comfortmaker platforms that use OEM kit 1183618. Confirm the part number printed on your existing board 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 condenser control-box panel.
3. Document — Photograph every harness connection and note any dip-switch or jumper positions before disconnecting.
4. Remove — Unplug each connector, release the board standoffs or screws, and lift out the old board.
5. Install — Mount the new board, transfer dip-switch/jumper settings, and reconnect each harness per your photo.
6. Test — Restore power and verify normal startup, heating/cooling changeover, and a forced defrost cycle.

Signs You Need a Replacement

• Heat pump no longer defrosts — ice builds on the outdoor coil
• Unit won't switch between heating and cooling
• Short-cycling or no response to thermostat calls
• Visible burn marks, scorching, or corrosion on the board

Shipping & Returns

Ships same day on orders placed before 3 PM CST. 30-day returns on unused parts. Backed by the National HVAC Parts fitment guarantee.