Rainsolft Amazon Q

is this an aqb or aqc ? If an aqb(brass valve ) I'd look for an air leak between the triguard and brine tank. If aqc it's either seals or an air leak at the elbow going into the brine tank. Did you happen to remove the brine tank and clean it? If not it could be mush built up in the bottom of the brine tank. Clean it out would be the first thing.

make sure the slots are clean on the intake tube...then on your display, press #3, press enter (this puts unit in manual mode)...then press start cycle to get to step 5 (brine draw)..this will drain the tank (but it takes a while)...after tank is drained, press start cycle to go through the remaining steps, at step 9 (fast rinse) let it run a bit to clean the remaining salt from the cylinder that you drew in..after that at step zero, it will return to the clock...then press #1, enter to get back to normal cycle....you may want to start a manual cycle after that to rinse the resin beads