Water heater shows E08, fan runs but ignition does not occur, or unit shuts down during operation.

Safety: Turn OFF power and gas. Risk of flue gas spillage if the air/flue system is compromised.

• Inspect silicone tubes: Locate the air pressure switch and its silicone tubes. Remove them and blow through gently to ensure they are clear. Replace any hardened or cracked tubes.
• Check condensate: Make sure the condensate trap and drain are not blocked, as water can fill the pressure tubes.
• Flue inspection: Visually inspect the flue for kinks, disconnections, or obstructions. Do not modify the flue length or configuration without following Termet guidelines.
• Switch test: With a multimeter, check continuity of the pressure switch when the fan runs (this test is usually done by a technician). If it does not change state, replace the pressure switch.
• Professional service: Because this fault affects combustion safety, final diagnosis and any flue modifications should be done by an authorized Termet service technician.