ICP Control Board Kit for RHS181L0BA0AAAA — Integrated Heat Pump Control | Ships Today

Overview

The 1183618 Control Board Kit is the genuine OEM electronic control for the ICP/Tempstar/Heil RHS181L0BA0AAAA heat pump. This board is the brain of the unit — it manages compressor staging, defrost timing, reversing-valve switching, fan control, and safety lockouts. When it fails you may see a unit that won't start, erratic defrost cycles, a condenser fan that runs continuously or not at all, or flashing diagnostic fault codes. Replacing the board with the exact OEM kit restores proper sequencing and protects the compressor from short-cycling. The kit ships complete with the mounting hardware and connector pigtails needed for a direct swap.

Specifications

Compatibility

Engineered for the ICP/Tempstar/Heil RHS181L0BA0AAAA heat pump condensing unit and closely related RHS181 series equipment built under the International Comfort Products family of brands. Always confirm your existing board part number reads 1183618 before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and the unit disconnect; verify zero voltage with a multimeter.
2. Access — Remove the control-panel service cover.
3. Document — Photograph every wire and connector landing before disconnecting.
4. Remove — Unplug the harness connectors, release the board standoffs, and lift the old board out.
5. Install — Mount the new board on the standoffs and reconnect each harness exactly per your photo.
6. Test — Restore power, run a heat and cool call, and confirm defrost, fan, and compressor sequencing.

Signs You Need a Replacement

• Unit completely dead with 24V present at the transformer
• Defrost cycle stuck on or never engaging in heat mode
• Flashing fault/diagnostic LED on the board
• Compressor or fan short-cycling or failing to energize

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.