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Twinboost423

Twinboost

423

Try this solution

Try the following

  1. Assure that water heater is switched off.

  2. Wait 15 – 30 minutes until device has cooled down.

  3. Check if water heater is filled with water.

  4. Refill with water if water was missing.

  5. Restart water heater.

Possible cause: Water heater overheat.

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