Zis420d Parts

This replacement main control board restores the refrigerator's electronic control system so the unit can respond to user inputs and regulate temperature cycles. Use when control failures affect operation or display functions. What it does:

• Receives and processes commands from the user interface to run compressor, fans, and defrost cycles
• Manages temperature control by signaling components based on sensor inputs
• Corrects symptoms such as no display, unresponsive controls, continuous running, or no cooling when the board has failed
• Interfaces with other modules to coordinate defrost and compressor timing

• Disconnect power before beginning work to avoid shock or damage
• Handle the board by its edges and avoid static discharge; wear an antistatic wrist strap if available
• Basic hand tools typically required; note connectors must be seated fully and harnesses routed as original