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White film on inside surface

White film on inside surface — Hard water minerals or salt residue

Teka · Dishwashers

What does White film on inside surface mean?

A white film inside the Dishwasher can be caused by hard water minerals or, if salt was recently added, traces of salt getting into the wash cycle.

Common Causes

  • Hard water minerals.
  • A programme was not run after Dishwasher salt was added, leaving salt traces.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    To clean the interior, use a damp sponge with Dishwasher detergent and wear rubber gloves.

  2. 2

    Never use any cleaner other than Dishwasher detergent to avoid foaming.

  3. 3

    If salt was added, run the quick wash programme (without crockery and without Turbo function) immediately after adding salt.

  4. 4

    If the issue is persistent hard water, ensure your water softener system is working correctly and refilled with salt.

Browse all codes in this manual (39)
Verified technical data. Last updated: April 2026

Related Faults

10 beeps every 30s10 beeps every thirty seconds — Dishwasher door opened during cycleBlack or gray marks on dishesBlack or gray marks on dishes — Aluminum rubbingBuzzer 8 secondsBuzzer sounds for 8 seconds — Wash cycle finished
Source: Teka Dishwashers
Open Manual (Page 27)Search more codes in this manual