Jenn-air, water dispenser is not functioning properly

Water dispenser does not flow strongly enough and will not shut off immediatly.
for the second time after replacing the filter the water runs slow and will not turn off, but trickles slowly for a time before going off.
I have by passed the filter and the same thing happens. I would like to take the convenience center apart and clean and replaced warn parts. is there any scamatics or digrams out there that will show me the process? I am thinking there is a mineral build up in the system and cleaning might help. the refrigerator is in my motorhome so will try most anything to fix before going thru the process of replacing the whole unit.

I thank you

You might have a partially frozen water line in the freezer door, or low water pressure to the fridg. Just check pressure first to elliminate that as a problem.