Viessmann Vitodens 100W boiler discontinuous heating

Hello Folks,

I have bought the Viessmann Vitodens 100W boiler three years ago. My boiler is facing a problem of discontinuous heating. I am unable to fix this issue after too much hard work. I am getting the heat at weird timings like sometimes at 3 am & so. Has someone faced this problem if so, and then please share your suggestions.



Hi James,

The best and recommended solution is to contact a professional Viessmann boiler engineer, as he will replace the mechanical controller head. Beside this, it is advised to drain the Viessmann boiler carefully & replace the control device afore topping up your boiler. Sometimes, the replacement of synchronous motor located on the control device will serve the purpose.