ICP Control Board Kit for RHH090L0CA0AAAA — OEM Heat Pump Board | Ships Today

Overview

This OEM control board kit (PN 1183618) is the genuine replacement for the ICP Tempstar Heil RHH090L0CA0AAAA heat pump. The control board is the brain of the unit — it manages the defrost cycle, sequences the compressor and fan, monitors the 24V control inputs from the thermostat, and energizes the reversing valve. A failed board causes erratic operation: no defrost, short cycling, failure to switch between heating and cooling, or a unit that won't respond to the thermostat at all. The kit ships with the components needed for a complete board swap.

Specifications

Compatibility

Designed for the ICP / Tempstar / Heil RHH090L0CA0AAAA heat pump and compatible Comfortmaker and Heil heat pump models that share the same control board kit. Match the OEM part number to 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 service panel to expose the control board.
3. Document — Photograph every wire and connector on the board, noting terminal labels.
4. Remove — Unplug the harnesses and unsnap or unscrew the old board from its standoffs.
5. Install — Mount the new board and reconnect each harness and lead exactly per your photo and the wiring diagram.
6. Test — Restore power and verify heating, cooling, and defrost operation.

Signs You Need a Replacement

• Heat pump won't respond to thermostat calls
• Defrost cycle never runs, causing coil ice-up
• Short cycling or random shutdowns
• Visible burn marks, scorched traces, 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.