ICP Control Board Kit for RHH120L0CA0AAAA — OEM Defrost/Control | Ships Today

Overview

This OEM control board kit (ICP part #1183618) is the factory replacement circuit board for the ICP/Tempstar/Heil RHH120L0CA0AAAA heat pump. The board is the brain of the outdoor unit — it manages the defrost cycle, sequences the compressor and reversing valve, switches the 24V control circuit, and protects against fault conditions. The kit ships with the mounting hardware and connectors needed for a clean drop-in replacement. A failed board typically shows up as no defrost, erratic operation, or a unit that won't run at all.

Specifications

Compatibility

Built for the ICP/Tempstar/Heil RHH120L0CA0AAAA heat pump and equivalent International Comfort Products platform units (Tempstar, Heil, Comfortmaker). Match the OEM kit number 1183618 and connector layout to your existing board before installing.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the condenser service panel to reach the control board compartment.
3. Document — Photograph every harness plug and terminal position before disconnecting.
4. Remove — Unplug each connector, release the standoffs or screws, and lift out the old board.
5. Install — Mount the new board on the supplied hardware and reconnect every harness per your photo.
6. Test — Restore power, run a heating and cooling call, and verify the defrost cycle initiates correctly.

Signs You Need a Replacement

• Heat pump won't defrost or ices over outdoors
• No response to thermostat calls despite good 24V
• Erratic compressor or reversing-valve sequencing
• Visible burn marks, swollen relays, or scorched traces on the board

Shipping & Returns

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