Dishwasher displays E9; often associated with heating issues or water leakage into the base.

Safety first: Disconnect power and water. If there is water in the base tray, be prepared for spillage.

• Inspect base tray: Remove the bottom panel and check for water in the anti-flood tray. If present, dry it completely and look for traces of leakage around the heater and pump assembly.
• Check heater body: Examine the flow-through heater for signs of corrosion, cracks, or burnt areas. Any visible damage means the heater must be replaced.
• Test thermal limiter: Some Teka heaters include a thermal fuse or limiter. Test continuity; if open, replace the heater assembly.
• Descale if minor: If there is heavy limescale but no leaks, consider descaling the dishwasher with a manufacturer-approved cleaner to prevent overheating. However, an E9 code usually indicates a part replacement is required.