Ariston Sooting / Incomplete Combustion

Soot deposits around the flue terminal or on nearby walls.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Severely misadjusted burner, Blocked heat exchanger, Incorrect flue installation, Wrong gas type

Safety: Sooting is a serious hazard indicating carbon monoxide risk. Turn off the furnace and do not use it until corrected.

Shut down: Switch off power and close the gas valve.
Ventilate: Open windows to clear any combustion products.
Do not clean and restart without service: The root cause must be corrected by a qualified Ariston technician who will clean the heat exchanger, burner, and verify combustion.

Professional Required 5/5

Primary Heat Exchanger

Check Price on Amazon

We may earn a commission from links on this page.