What do I do if my viessmann vitodens boiler 100 is showing 0.5 bar ? help, have no hot water or heating now:(?
Viessmann Vitodens 100 Boiler
The boiler has shutdown due to low pressure.You need to raise the pressure to between 1 1.5 bar. There should be a filling loop near the boiler [a short stainless steel flexible pipe] open the valve to let in more water to raise the pressure.
Increase the water pressure on the boiler. There is a fexible filling loop fitted with a valve at one end to open the filler. Open, and fill to 1 and a half bar, then turn the valve off. Boiler should then be okay. If you start to lose water pressure often, then you have a faulty pressure valve and it has to be replaced. They cannot be repaired.
