Ariston 65103422 Printed Circuit Board

The Ariston 65103422 is a printed circuit board (PCB) used as the main control board in Ariston water heating appliances. It carries the processing and switching circuitry that governs the appliance's operating sequence, reading inputs from sensors and thermostats and driving the fan, pump and burner controls where fitted. As a manufacturer-supplied board, it is the direct replacement for the original fitted at production.

• The appliance fails to run through its start-up sequence, with no response at the control panel.
• Repeated lockouts or fault codes that clear only temporarily and return on the next cycle.
• No display, dead indicator lights or a board that shows no sign of power despite a healthy supply.
• Erratic behaviour from components that the board controls, such as the fan, pump or ignition sequence.
• Visible damage to the board itself, including scorching, burnt tracks or swollen capacitors.

• Confirm the appliance model and the part number printed on the existing board match 65103422.
• Check the appliance data badge and any serial or GC number so the correct variant is identified.
• Inspect the wiring harness, connectors and any seals disturbed during removal, and replace them if they are damaged.