Ariston Delayed Ignition

Furnace ignites with a small explosion or loud 'whoomph' sound.

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

Dirty burner, Incorrect electrode position, Low gas pressure, Slow-opening gas valve

Safety: Delayed ignition can damage the heat exchanger and flue. Stop using the furnace until inspected.

Visual inspection: With power and gas OFF, inspect the burner for heavy rust or debris and clean carefully.
Check ignition electrode position: Ensure the electrode is correctly aligned with the burner as per Ariston specifications.
Professional service: A technician must check gas pressure, valve operation, and combustion to correct delayed ignition.

Professional Required 5/5

Burner Assembly

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