ICP Control Board Kit for RHH120H0EA0AAAA — Heat Pump Defrost Board | Ships Today

Overview

This is the genuine OEM control board kit (part 1183618) for the ICP / Heil / Tempstar RHH120H0EA0AAAA 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 provides safety lockouts. A failed board typically shows up as a heat pump that won't defrost (icing over in heating mode), won't switch between heating and cooling, or won't energize the compressor at all. This kit ships with the board and the mounting hardware needed for a clean replacement.

Specifications

Compatibility

Direct OEM replacement for the RHH120H0EA0AAAA and shared ICP-family heat pumps marketed under Heil, Tempstar, and Comfortmaker. Match the existing board's part number and connector layout before ordering, as control boards are platform-specific.

Installation Guide

1. Safety First — Disconnect power at the disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the control box / electrical access panel on the outdoor unit.
3. Document — Photograph every harness connector and wire location on the old board before unplugging.
4. Remove — Unplug each connector, release the board standoffs or screws, and lift out the old board.
5. Install — Mount the new board and reseat every connector in its matching position per your photos.
6. Test — Restore power, call for heating and cooling, and verify proper compressor, reversing valve, and defrost operation.

Signs You Need a Replacement

• Heat pump ices over and never enters defrost.
• Unit won't switch between heating and cooling modes.
• Compressor or fan won't energize despite a thermostat call.
• Visible burnt traces, scorching, or a blown relay on the board.

Shipping & Returns

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