Dishwasher displays E13, often related to unusually high inlet water temperature.

Safety first: Hot water can cause burns; handle hoses carefully.

• 1. Check water connection: Confirm whether the dishwasher is connected to cold or hot water. Constructa dishwashers are typically designed for cold or moderately warm water (up to the specified limit in the manual).
• 2. Measure inlet temperature: Run the kitchen tap and measure water temperature with a thermometer. If it exceeds the dishwasher's rated maximum (often around 60°C), adjust your boiler or mixing valve.
• 3. Switch to cold feed: If possible, reconnect the dishwasher to a cold water supply to avoid E13 and protect internal components.

When to call a technician: If inlet temperature is normal but E13 persists, the temperature sensing system should be checked professionally.