Oven will not heat in any mode, display and lights work normally

Safety first: Disconnect the oven from mains power by switching off the circuit breaker or unplugging it. Verify power is off before removing any panels.

• Check supply voltage: Confirm the wall outlet or cooker connection is supplying correct voltage (usually 220–240 V AC). If no power, the issue is external to the oven.
• Inspect terminal block: Remove the rear cover and inspect the mains terminal block for burnt wires or loose screws. Tighten connections and replace any burnt wiring or the terminal block if damaged.
• Access the main PCB: On many Ariston built-in ovens, the main control board is behind the front control panel or top cover. Remove the screws, carefully pull the panel forward, and locate the PCB.
• Check for visible damage: Look for burnt components, cracked solder joints under the main power relay, or darkened areas on the board. If present, the PCB should be replaced as a complete unit.
• Test relay output: With power restored and extreme caution (only if you are trained), measure voltage at the oven heating element terminals when a heating mode is selected. If no voltage is present and the PCB input is correct, the main board/relay is faulty.
• Replace PCB: Label and disconnect all harness plugs, remove mounting screws, and install the new genuine Ariston control board. Reconnect wiring exactly as before, reassemble, and test.

Warning: Live voltage testing and PCB repair should only be performed by qualified persons. If unsure, contact an authorized Ariston service center.