Viessmann VS 87 - User Manual

Questions and Answers

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Stephanie McguireAug 10, 2025
How to fix Viessmann VS 87 Water Dispenser not producing soft water?
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  iquinnAug 10, 2025
  If your Viessmann Water Dispenser isn't producing soft water, it could be due to several reasons. First, check if the salt storage tank is empty and add salt if needed. Also, the salt might have formed a 'bridge'; if so, break it up. Ensure the power supply is properly connected and the outlet is functioning. The bypass valve(s) should be in the service position. The nozzle and venturi assembly might be dirty, plugged, or damaged, requiring cleaning and inspection. Finally, inspect the drain hose for any kinks, bends, or obstructions.
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lauratuckerAug 15, 2025
Why is Viessmann VS 87 water hard sometimes?
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  Andrew BradshawAug 15, 2025
  If the water from your Viessmann Water Dispenser is sometimes hard, there might be a few reasons. It could be due to hard water being bypassed during recharge because the current time or recharge time settings are incorrect, so check and correct these settings. Also, the hardness number setting might be too low, so check the current hardness setting and increase it if needed. Avoid using hot water during recharges, as the water heater refills with hard water. An increase in the actual hardness of the water supply might also be the reason, so test an unsoftened water sample and adjust the hardness setting accordingly. Finally, the turbine might not be turning freely, so check the turbine.
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Mr. Kevin OrtegaAug 22, 2025
What to do if Viessmann VS 87 motor stalled or clicking?
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  Jennifer HendersonAug 22, 2025
  If your Viessmann Water Dispenser motor is stalled or clicking, it indicates a motor malfunction or an internal valve fault creating high torque on the motor. In this case, you should contact a service technician.
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Julie MontoyaAug 28, 2025
What does error code E1, E3 or E4 on Viessmann Water Dispenser mean?
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  Matthew HendersonAug 28, 2025
  If your Viessmann Water Dispenser displays error code E1, E3, or E4, it suggests a fault in the wiring harness, connections to the position switch, switch, valve, or motor. It is recommended to contact a service technician.
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chardingSep 3, 2025
What does error code E5 on Viessmann Water Dispenser mean?
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  Rebecca WalkerSep 3, 2025
  If your Viessmann Water Dispenser displays error code E5, it indicates an electronic control malfunction. In this situation, you should contact a service technician.