Boiler emits a burning smell or plastic smell during operation

Safety: If you smell burning plastic or see smoke, turn off power and gas immediately and do not use the boiler.

• Initial use: A slight smell when the boiler is first used after a long period can be normal as dust burns off. This should clear quickly.
• Inspect internally: With power off, remove the front cover and look for signs of scorching, melted plastic, or discoloured wiring around the pump, fan, and PCB.
• Check ventilation: Ensure the boiler cupboard has adequate ventilation as per Ariston's requirements.
• Professional inspection: Any persistent burning smell requires an engineer to test components and replace any overheating parts.