ICP Control Board Kit for RHH090H0AA0AAAA — Heat Pump Defrost Control | Ships Today

Overview

This OEM control board kit (part 1183618) is the brain of the ICP Tempstar Heil RHH090H0AA0AAAA heat pump. It manages the defrost cycle, sequences the compressor, condenser fan, and reversing valve, and processes the 24V thermostat inputs. When the board fails, you'll see erratic operation — no defrost in cold weather, the unit stuck in one mode, the reversing valve not shifting, or no response to a thermostat call. The kit ships with the components needed for a clean board swap and restores correct heat-pump logic and timing.

Specifications

Compatibility

Designed for the ICP Tempstar Heil RHH090H0AA0AAAA heat pump and compatible RHH-series outdoor units. Confirm your existing board part number before ordering, as control boards are model-specific.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the control-box service panel.
3. Document — Photograph every plug, terminal, and jumper position before disconnecting.
4. Remove — Unplug the harnesses, release the standoffs, and lift out the old board.
5. Install — Mount the new board, match all connectors and jumper settings to your photo.
6. Test — Restore power, run a heat and cool call, and verify a defrost cycle initiates.

Signs You Need a Replacement

• No defrost cycle, causing ice buildup on the coil
• Reversing valve won't shift between heat and cool
• Unit unresponsive to thermostat calls
• Visible burnt traces, scorched relays, or blown components on the board

Shipping & Returns

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