Classeq
Underheating / Slow Heating Without Error
Classeq dishwasher leaves dishes cold and not properly sanitized; water never seems hot, but no specific error code appears.
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Safety Warning
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.
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Possible Causes
Scaled heating elements, Partially failed heating element (reduced power), Incorrect temperature calibration, Faulty NTC sensor drifting out of range
How to Fix / Troubleshooting
Safety first: Isolate power and allow the machine to cool before working on heating components.
- Verify temperatures: Use a thermometer to measure wash and rinse temperatures during operation. Compare with Classeq specifications.
- Descale tank and boiler: Perform a full descale using a Classeq‑approved descaling agent to remove limescale from the tank heater and boiler heater.
- Check heater power: Measure current draw of the heaters (qualified personnel only). A significantly low reading may indicate a partially failed element.
- Inspect NTC sensors: Replace tank and boiler NTC sensors if readings are inaccurate or unstable, even if no error code is present.
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Repair Difficulty
Hard
4/5
Required Part
Tank Heating Element
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