Cooling fan at the top of the oven does not run; control panel becomes very hot; error may appear after some minutes

Safety first: Disconnect power and allow the oven to cool fully before working near the fan.

• Locate cooling fan: On Ariston built-in ovens, the tangential cooling fan is usually mounted above the oven cavity behind the top cover.
• Inspect for obstruction: Remove the top cover and check that no insulation, wiring, or debris is blocking the fan wheel. Clear any obstructions.
• Spin test: Manually rotate the fan wheel. It should spin freely without grinding. If stiff or seized, the fan motor must be replaced.
• Electrical test: Disconnect the fan and measure resistance across the motor terminals. An open circuit indicates a failed motor. Also check for correct supply voltage at the fan connector when the oven is heating (only if you are trained to work on live circuits).
• Replace cooling fan: Remove mounting screws, disconnect wiring, and install a new genuine Ariston tangential cooling fan. Ensure wiring is routed away from moving parts.
• Check PCB relay: If the fan motor is good but never receives power, the cooling fan relay on the control board may be faulty. Replace the PCB if necessary.