Hi, welcome to just answer
How old is it ?
o k and please tell me its model number...it might start from ADG ....
F 7 is a flow meter error which indicates the problem...you will have to check the water inlet valve and hose and make sure it is clean
after cleaning if the problem is still there then water inlet valve has to be replaced
you'll have to pull it out to check the inlet
You can get back to me if you need any assistance and I will help with no additional charges....
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OK, if you have cleaned the valve and hose completely then please try this as well...with the dishwasher unplugged...take the base off and then clean it completely...make sure it is clean and dry...plug it back and let me know if the problem is still there