ICP Control Board Kit for RHS183L0BA0AAAA — 24V Defrost Board | Ships Today

Overview

This OEM Control Board Kit (part number 1183618) is the control center of your ICP / Tempstar / Heil RHS183L0BA0AAAA heat pump. The defrost control board manages the 24V control circuit, coordinates the compressor contactor, reversing valve, and outdoor fan, and runs the timed defrost cycle that clears frost from the outdoor coil in heating mode. A failed board strips the unit of its ability to switch modes correctly or defrost — resulting in a coil that ices over, a system that short cycles, or a compressor that never energizes. Dropping in the exact OEM kit restores factory control logic and defrost timing.

Specifications

Compatibility

Built for the ICP RHS183L0BA0AAAA heat pump and shared chassis units sold under the Tempstar, Heil, and Comfortmaker brands. Confirm the OEM part number stamped on your existing board before installing.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the outdoor unit's electrical service panel.
3. Document — Photograph every wire and terminal on the existing board before disconnecting.
4. Remove — Label and unplug each connector, release the standoffs or screws, and lift out the old board.
5. Install — Mount the new board and reconnect every wire to match your photos exactly.
6. Test — Restore power and verify the defrost cycle, compressor, and reversing valve operation.

Signs You Need a Replacement

• Outdoor coil ices over and never defrosts in heating mode.
• Compressor or reversing valve will not energize.
• System short cycles or switches modes erratically.
• Visible burn marks, corrosion, or failed relays on the board.

Shipping & Returns

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