Refrigerator Q403WSKVE Motherboard / Computer Power Board — SQ6.620.357 Key benefits Restores control and power management to the refrigerator Q403WSKVE when the original control board has failed. Solves common symptoms caused by a faulty board: no power to compressor, unresponsive display or controls, erratic temperature control, or sensor communication errors. Simple swap for technicians and experienced DIYers to get the appliance back to normal operation without replacing the entire unit. What this part does Acts as the main control (motherboard/computer) and power distribution board for the refrigerator model Q403WSKVE. Manages inputs from temperature sensors, user interface controls, and drives outputs to compressor, fans, defrost heater, and other controlled components. Provides the boardlevel power regulation and logic needed for coordinated refrigerator operation. Key attributes Product name / identifiers: Refrigerator Q403WSKVE Motherboard Computer Board Power Board — SQ6.620.357 Functionality: Main control board and power board for refrigerator operation and system management. Compatibility: Designed for refrigerator model Q403WSKVE and specified as part number SQ6.620.357. Construction: Printed circuit board assembly (PCB) with mounted electronic components (connectors, relays, processors, and power components as required for control and power functions). Performance: Restores electronic control and power management functions to the appliance when the original board is defective. Use cases / applications a failed control board on a Q403WSKVE refrigerator that is not powering on, has no display response, or shows erratic temperature control. Support appliance technicians during inhome service calls to restore normal refrigerator operation quickly. Keep as a spare part for a parts inventory if you service multiple Q403WSKVE refrigerators or manage appliance maintenance. Installation and handling notes Intended for qualified service personnel or experienced DIYers familiar with appliance disassembly and electrical safety. Disconnect power to the refrigerator before attempting board removal or installation. Verify the part number SQ6.620.357 matches the original board before replacing to ensure correct fit and function. Handle the board using antistatic precautions to avoid damage to electronic components. What to check before ordering Confirm your refrigerator model is Q403WSKVE and that the defective part number corresponds to SQ6.620.357. Compare connector locations and mounting points with the existing board to ensure compatibility. This motherboard / computer power board (SQ6.620.357) is the designated replacement component for the Q403WSKVE refrigerator model to restore electronic control and power management functions.