• Sustainable renewable energy
  • Residents are protected by the Heat Act
  • More than 200 projects in operation and management

Report malfunction

Do you have a malfunction in the supply of heat, cold, or heating water? That is annoying and of course, you want it solved as soon as possible. First of all, the cause of the failure must be determined so that it becomes clear who can solve the problem. The property boundary indicates who is responsible for what. You can find this on the resident’s page of the project where you live. Go to www.vaanster.nl and enter your zip code and house number. You will then be redirected to the corresponding residents' page. There you will find the property boundary of the relevant project.

Malfunction in the heating or cooling system
  •     Determine whether there is a fault in the heating or cooling supply in some or all rooms.
  •     If the failure occurs in a part of your home, then heat is being supplied to your home but not to all the rooms. This indicates a failure in the internal installation, for example in your (room) thermostat, in the controller, or a part of your floor distributor. The property boundary indicates who owns these parts in your home.
Do you suspect a fault in all the rooms in your home?
  •     Check that the thermostat is set correctly. You can temporarily set the desired temperature higher or lower on the thermostat. Make sure your thermostat is set to a higher or lower temperature than you desire to achieve. This will allow you to check after some time if the temperature in your home is changing.
  •     Check whether the thermostat batteries need replacing. The thermostat will indicate when the batteries need to be replaced.
Is your heating system still not getting warmer?
  •     Check to see if your neighbors are experiencing a similar malfunction. This would indicate a collective failure. This information is important for resolving the fault quickly and effectively.

Then report the malfunction to Vaanster by calling: 0900 - 822 678 37.
This telephone number is available 24 hours a day, 7 days a week.

It is possible that you cannot reach an 0900 telephone number with your telephone number. In that case call to phone number: 030 - 225 56 40. You will be asked by telephone to carry out the above mentioned checks, so reporting a malfunction will be extra quick if you indicate that you have already done so.