What to do if the vaillant t4 boiler breaks down?

Question

Do it yourself

I don’t know where to write anymore, so I’m writing here and maybe someone already had this.
The boiler either ignites or not, the master said that the board burned out, but the boiler sometimes works.
Mostly it starts working when you remove the corrugation from above, checked it pulls air from the house.

Answer 1

Contact the service center

Answer 2

There may be 100500 reasons, but most likely you have problems with the turbine . Try to clean