Thank you, Justalurker. The brine line is fine.
The float valve is enclosed in a plastic cylinder inside the brine tank. The cylinder is about 4" diameter and about 3/4 length of the brine tank. I have no idea how this one works since I cannot see any moving parts. Plastic cylinder is opaque. I have the manual. Already took the small brine valve off the head and inspected. There was a small piece of debris, but not enough to block the flow. Looks like I need to empty the brine tank and try to take that cylindrical "thing" out and inspect.

Thanks.
Matt

Matt,

Sometimes the brine valve in the back of the control just sticks and the spring tension isn't enough to free it. I would try another regeneration after finding debris after checking the brine pickup.

The float assembly (brine pickup) is easily removed the the brine well (4" tube). Remove the brine line and unscrew the little nut near the top of the tube. Don't drop the nut!

Angle the top of the float assembly to the other side of the inside of the well, the stud is attached to the float assembly. Once the stud is clear the entire float assembly will lift out of the brine well. Don't move the float setting on it's shaft.

An easy and quick check of the brine pickup is to disconnect the brine line at the 5600. Blow into the tube and see if you get bubbles in the brine well. Then suck on the tube and you should get salty water in your mouth.

Thank you, Justalurker. Will disconnect the brine line and check as you said. Will also try one regeneration (with the end of line just immersed in the tank, with no connection to the float valve) to see if the float is the culprit.

Thanks.

Matt

If you have the Fleck 2310 safety float then the float is only an overflow safety mechanism. The brine pickup has an air check valve to prevent the control valve from sucking air when it has drawn all the brine it can.

If the float is stuck in the up position it can prevent brine from being sucked out (brining stage) and water from being returned to make brine (brine refil stage).

If there is no water in the brine tank, as you describe in your first post, then the problem is either the main piston, the motor, the BLFC is blocked, the cam that pushes the brine valve, the brine valve, the tube from the float assembly to the control is blocked, or the air check/brine pickup is clogged

Thank you, Justalurker. I finally found enough time to play around with the system and finally found the problem.
The float actually fell off the metal arm it was inserted into and was at the bottom of the plastic tube. Since the tube had a cap I never saw it. (in fact the cap has such a seamless fit I always thought the top end was molded closed, until I checked closely)Once I found the problem it was a simple fix- emptied the brine tank, re-assembled the valve mechanism, refilled the brine tank, and it works like it used to work. It was really stupid of me not to check it first!
Thanks again.
Matt

You got it fixed and it cost you... NOTHING. It was a good day.