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Zanussi | Help and Support

Condensation / water / moisture gathers inside the oven, inside the oven door, between the glass panels


If Condensation / water / moisture gathers inside the oven, inside the oven door, between the glass panels, refer to the suggestions below for step by step instructions.

Causes of condensation are:
  • The new generation of ovens have a very good energy efficiency class and is therefore well insulated. In daily use, this means that, for example, less water must be added during the preparation of roasts because the moisture remains predominantly in the oven and is not blown out as in the case of older ovens.
  • Some models are designed with a system which incorporates steam into the cooking process so that food becomes tender inside and crispy on the surface. The oven constantly circulates the air and recycles the steam. This reduces both cooking time and energy consumption.
  • An additional cooling fan in the oven or stove ensures a cool front, thus as moisture condenses at the coldest point as condensation, water droplets are often observed.
  • The moisture leaves the oven through ventilation ducts, including the door. Steam can settle in as moisture in the oven compartment or on the glass panels. This means that stains and condensation can form between the two glass panels in the door. The stains are caused by grease particles reacting with the cooling air.
  • Moisture is released when food is heated up in an oven, especially in the case of frozen items. 
To keep the condensation as low as possible, we recommend:
  • Reduce the supply of moisture during the preparation of food
  • Open the door immediately after the end of the preparation process
  • Remove the food immediately after switching off the oven
  • Pre-heat the oven (depending on model)
  • Wipe away the condensation every time you use the oven. Refer to the user manual, if necessary. (If you do not have your user manual, refer to Where can I find the user manual for my appliance?).
  • In extreme cases, we recommend requesting a visit by a service engineer.



To help you determine the exact nature of the problem, we recommend a visit by one of our authorized engineers to check the appliance and fix the problem.

When contacting us, please have the following information to hand. You will find this information on the manufacturer’s data plate:

  1. Model number
  2. Product number (PNC)
  3. ELC number
  4. Serial number

Data plate with model number, product number/PNC, ELC and serial number:

  1. Model number
  2. Product number (PNC)
  3. ELC number
  4. Serial number

[3–9999] Where will I find the data plate on my product? 

NOTE: Depending on the problem, you may be charged for a service visit by an engineer, even during the warranty period.

Make a note of the reported error code and quote it when you request an engineer. This will not solve your problem, but it will help our engineer identify the cause of the problem.

  • Report error code: BU

Warning: We do not recommend using the product until the problem has been completely fixed. Unplug the product and do not plug it in again until you are certain that it is OK to do so.

You can request a visit by one of our engineers by clicking on the link below.