How can I figure out why my undersink water filter system is clogged?




enter image description hereMy 3-year-old undersink water filter system stopped working (i.e., no water comes out). I changed the filters but still no water is flowing. Any suggestions on where to look for the blockage? My contractor did not leave a manual for this device and I cannot tell who manufactures it.
#Kitchen-sink #Water-filtration
Kitchen Water