Hi Andreas;

My experience with the Hayward CL series feeders is that they are badly designed, and usually "broken from the factory". Years ago, when I was servicing lots of commercial pools, I wouldn't even offer a contract on pool, unless they agreed to remove and replace those monsters. There's a lot of Hayward equipment that I like, but not those miserable chlorinators.

Part of the problem with them is that they tend to be VERY erratic, working sometimes and not others. At this point, I could probably disassemble a couple and figure out why they are so bad, but it's not worth it: those units have a shrinking market, and Hayward is not going to spend money redesigning and retooling.

Just get rid of the stupid thing! Not only is the Hayward CL series a problem, OFFLINE trichlor feeders are tricky, and usually installed incorrectly.

Put your tabs in the skimmer, in a floater, or in an INLINE chlorinator:
Pentair Rainbow Pool Auto Feeder Model 320 R171096 @ Amazon

(I don't love inline feeders, either: install the unit DOWNSTREAM of all equipment and NOT in an enclosed space. Also, be SURE to run your pump 2x per day, at separated intervals. Water standing in a trichlor feeder will generate chlorine gas, and if you let it sit too long, your feeder can 'burp' chlorine gas onto a swimmer!

Has happened to a PF member; fortunately, no one was hurt!

One more thing: you may want to change your email address in your PF profile to a Gmail, Hotmail or Yahoo .COM address. 98% of the traffic I have from ".de" -- Deutschland -- is from hackers, and I have an ever increasing amount of .de netspace blocked in firewall. If I happen to get a hacker attempt from 213.165.0.0/16, where the web.de mailservers live, your email address will be blocked, and you'll lose access. You probably want to do this anyway, while you are in the US, since email from a .de address will tend to be flagged as spam.