Dishwasher does not heat properly, extended program times, E10 displayed.

Safety first: Unplug the appliance before accessing the base or heater area.

• 1. Confirm extended cycle: If programs run much longer than normal and dishes are lukewarm, the control may be struggling to detect correct temperature.
• 2. Locate NTC sensor: On Constructa models, the NTC is usually clipped into the heater housing or sump area. Access from below or side.
• 3. Check seating and wiring: Ensure the sensor is firmly clipped in place and its connector is secure. Look for damaged or pinched wires.
• 4. Basic sensor test (for experienced DIYers): With the sensor disconnected, measure its resistance at room temperature. Compare to service data if available; a completely open or shorted sensor is defective.

When to call a technician: If E10 persists after reseating the sensor and checking wiring, the NTC or control board should be replaced by a professional.