Hi, welcome to Just answer
Please tell me its complete model number
and how old is it ?
OK and the pump is now completely cleaned ?
ok F05 error indicates pressure switch is stuck
no, if you have already cleaned the pump then you will have to check the small pipe attached to pressure switch
This is the pressure switch
No just try to clean the pressure switch and a small hose attached to it
with the back of screwdriver just give tap this switch few times as well lightly
take that tube off and blow through it to make sure it is clean
then check if it works, if the error is still there check the drain hose connecting the unit and also remove the pump to clean it completely
let me know how it goes
all good ?
Did that work ?
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