Viessmann FS0900 Series User Manual (English)

Questions and Answers:

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Lauren MerrittAug 12, 2025
Why is my Viessmann Refrigerator unit constantly running?
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  Brandon ShieldsAug 12, 2025
  If the Viessmann Refrigerator unit runs constantly, several factors could be the reason. The coldroom might be filled to capacity, in which case you should store less or at a higher temperature, paying attention to storage dates. There might be too much in storage, the goods may be too warm, or the door may have been open too long; reduce the amount you store, allow warm goods to cool before storing, and minimize door opening times. High ambient temperature or blocked suction and exhaust vents can also cause this; reduce ambient temperature and maintain at least 250 mm of free space in front of all openings. Lastly, a dirty evaporator or condenser can be the cause; clean the fins with a brush and vacuum cleaner, being careful not to bend them.
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phillipmonroeAug 16, 2025
What to do if the alarm light is flashing Error Code F3 on my Viessmann Refrigerator?
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  Edward DavisAug 16, 2025
  If the alarm light is flashing Error Code F3 in the display of your Viessmann Refrigerator, it means the high pressure pressostat has been activated. Check the condenser for contamination and clean it if necessary. Also, check if the condensing ventilator is running and reduce the ambient temperature.
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Marie MoraAug 20, 2025
What does it mean when the alarm light is flashing Error Code F4 on my Viessmann Refrigerator?
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  Connie BuckleyAug 20, 2025
  If the alarm light is flashing Error Code F4 on your Viessmann Refrigerator, the coldroom standard temperature has either been exceeded or is too low. You should check the evaporator for contamination and clean it if necessary. Inspect the evaporator for icing and initiate manual defrosting if needed. Also, ensure the evaporator ventilator is running.
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scott30Aug 23, 2025
Why is the alarm light flashing Error Code F5 on my Viessmann FS0900 Refrigerator?
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  Larry PetersenAug 23, 2025
  If the alarm light on your Viessmann Refrigerator is flashing Error Code F5, it indicates that the door contact switch is not connected, or the coldroom door has been open for more than four minutes. To resolve this, put the sliding switch on the control panel into the position without the door contact switch and close the door.
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Alexandra LarsonAug 27, 2025
What to do if my Viessmann FS0900 Refrigerator runs constantly and the evaporator has ice deposits?
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  Nathan WigginsAug 27, 2025
  If your Viessmann Refrigerator unit is running constantly and the evaporator has ice deposits, it could be due to several reasons. The door may have been open too long, so try to open it only for brief intervals. Uncovered fluids stored in the cell can also cause this, so ensure all fluids are covered. Additionally, the defrosting cycles might not be optimal. Try initiating manual defrosting. If necessary, shorten the defrosting cycle or, if the evaporator is still icy after the defrosting cycle, extend the defrosting time.
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James NguyenAug 31, 2025
What does Error Code F1 mean on a Viessmann FS0900?
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  Deborah KennedyAug 31, 2025
  If the alarm light is flashing Error Code F1 in the display of your Viessmann Refrigerator, it indicates a short circuit in the temperature sensor. You should replace the temperature sensor.
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robinsonjamesSep 4, 2025
What does it mean when my Viessmann FS0900 shows Error Code F2?
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  Marcus WestSep 4, 2025
  If the alarm light is flashing Error Code F2 on your Viessmann Refrigerator, it means the temperature sensor is broken, and the coldroom temperature is above 50°. You will need to replace the temperature sensor.
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nicole07Sep 7, 2025
How to fix a Viessmann Refrigerator when the refrigeration unit is not running?
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  Maria HayesSep 7, 2025
  If the refrigeration unit of your Viessmann Refrigerator is not running, it could be due to an interrupted power supply or a defective regulator. Check the plug and fuses. If the problem persists, it is recommended to contact a specialist.