Buffer tank boiler problem

[fripon]

Circulator or valves....

Wood boiler, it sends "heavy", for a short time, if there was a circulation problem, the safety valve would drain...

Do you have good outbreaks?

How many radiators, what power of radiators?

yes we usually heat very well in 6 years we haven't had any problems and since last week it's been fine no more 5 radiators set to 4 upstairs and 5 on the ground floor

[fripon]

Another question: did it happen suddenly?
In other words, had it restarted normally at the start of the heating period?

or all until last week suddenly she didn't want to heat anymore

[fripon]

Ok, you need a diagram (freehand is good) if you want us to help you...

IMG_1367.png (22.28 KB) Viewed 865 times

shema but I don't understand anything about all these tips :/

[gfgh64]

it remains blocked sending 55 degrees while my buffer and has more than 70 at the top it has something that undermines the 3-way valve and when we cut the buffer tank it heats more in direct route than before a buffer which is hot

are the radiators cold or warm?
everything is in order on your "4"