DeLonghi 685 Coffee Not flowing Not filtering Pressure building up in filter
Sometimes, not too often the coffee will not flow through the filter to the cup and what you will find is the pump slows down / quietens down and gives up trying leaving a large pressure build up in the filter holder which can’t be good for the machine. Remove the filter from the filter cup and check the pin hole as per the manual and if it is blocked insert a pin or needle to clear it. Sometimes as happened to me even though the pin hole is clear (hold up to light in background as easier to see) it is still blocking the flow and pressure still building up in the filter holder then you will need to use a notice board coloured pin so it can be gripped and then push it as far through the hole until you can feel some of the pin head on the other side. For some reason it just expands the metal hole the most tiniest of a fraction without damaging the metal but it is enough to allow for the flow of coffee to run from the filter holder to the cup. Remember just because the manual says unblock the coffee blockage in the tiny hole in the filter and in doing so does not necessarily solve the blockage / flow problem. Also you may need to force the hole opening a couple of times and push and rotate against the edges but it will work eventually as when the pressure is building up in the filter holder it has no where to go and needs to get through the tiny hole. Finally always, as per the manual, ensure that the many little holes in the filter disk if there is one with your model is clean and clear (also hold up to light in background to see all the clear holes)