Worcester Bosch Greenstar Service mode, combustion analysis, Chimney sweep mode, Combi boiler

okay guys so how to put a Worster was green star 30i into service mode for your combustion analysis high and low setting very easy on these we've got a chimney sweep mode which is just there which is reset button uh wake it back up press and hold it up until screen changes and when it does it gives you Max so it's set to Max now give you about 30 seconds uh and it will ramp up to maximum setting and if you need to move it to minimum once you're finished with maximum setting just press this down button and it goes to minimum and then to take it back out press the reset button again that's it