ICP Control Board Kit for RHH048K0XA0AAAA — OEM Defrost Control | Ships Today

Overview

This OEM control board kit (part 1183618) is the electronic brain of your ICP RHH048K0XA0AAAA heat pump. It manages the defrost cycle, sequences the compressor and reversing valve, controls fan timing, and protects the system with built-in delays and lockouts. A failed board causes no-heat or no-cool conditions, ice buildup on the outdoor coil from missed defrost cycles, short cycling, or a completely dead unit. This factory kit includes the board and mounting hardware for a clean, exact replacement.

Specifications

Compatibility

Engineered as a direct OEM fit for the ICP/Tempstar/Heil RHH048K0XA0AAAA heat pump and equivalent RHH-series outdoor units that use this control/defrost board. Match the OEM part number on your existing board before ordering.

Installation Guide

1. Safety First — Disconnect power at the breaker and verify zero voltage with a multimeter.
2. Access — Remove the control access panel on the condensing unit.
3. Document — Photograph every plug, terminal, and wire color before disconnecting.
4. Remove — Unplug the harnesses, remove the mounting screws/standoffs, and lift out the old board.
5. Install — Mount the new board on the supplied standoffs and reconnect each harness to its labeled terminal per your photo.
6. Test — Restore power, run a heating and cooling cycle, and confirm proper defrost operation.

Signs You Need a Replacement

• Heat pump won't run or repeatedly short cycles
• Outdoor coil icing over from missed defrost cycles
• No response to thermostat heat or cool calls
• Visible burn marks, corrosion, or failed components on the board

Shipping & Returns

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