No hot water on a Worcester Bosch 30i erp combi boiler water running hot and cold diagnosed fault

This Worcester Bosch 30i combi boiler had the water running hot and cold, I turned up and tried the tap for myself.
The temperature began to rise very quickly and the boiler reached temp and cut out making the water from the tap cold.
In this video I explain what’s happening in this situation, how to diagnose and what part to change…
Hope this helps ✅

[hamzaparvais]

Thank you well explained can't wait to do one

[hamzaparvais]

Yes man thanks i just done one no leaks and job well done much appreciate

[tomstrutton]

I like it when they empty the cupboard for us

After the replacement, the flow temp looks like it still went up too quick

[robindargavel]

How many thousand pound did you charge for this?

[russellthomas]

Kebab heat exchanger looks like it’s been overheated a few times there too

[gazzagasco]

Easier to cut hot water pipe. Drop down back. Good job pal