ICP Control Board Kit for RHH120L0EA0AAAA — OEM 1183618 Heat Pump Board | Ships Today

Overview

The ICP OEM Control Board Kit (part number 1183618) is the factory-engineered control module for the ICP / Tempstar / Heil RHH120L0EA0AAAA heat pump. This board is the brain of the outdoor unit — it manages defrost timing, sequences the compressor and reversing valve, monitors safety and sensor inputs, and ties the thermostat call together with the outdoor controls. When the board fails, the heat pump may go completely dead, skip defrost cycles and ice over, short-cycle, or throw fault codes at the thermostat. Installing the exact OEM kit eliminates the compatibility headaches and wiring guesswork of universal aftermarket boards and restores dependable heating and cooling.

Specifications

Compatibility

Engineered as a direct-fit replacement for the ICP RHH120L0EA0AAAA heat pump and shared-chassis units sold under the Tempstar, Heil, and Comfortmaker labels. Verify the part number printed on your existing board matches 1183618 before installing.

Installation Guide

1. Safety First — Disconnect power at the outdoor disconnect and breaker, then verify zero voltage with a multimeter.
2. Access — Remove the outdoor unit's control/service panel.
3. Document — Photograph every wire and connector position before disconnecting.
4. Remove — Unplug all harness connectors and remove the mounting screws/standoffs holding the old board.
5. Install — Mount the new board on the standoffs and reconnect each harness exactly per your photos.
6. Test — Restore power and verify operation in both heating and cooling, including a defrost cycle.

Signs You Need a Replacement

• Outdoor unit is completely unresponsive
• Heat pump ices over from skipped defrost cycles
• Intermittent or short-cycling operation
• Visible burn marks, swollen capacitors, or cracked traces on the board

Shipping & Returns

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