You don't say what make it is, try going to the makers first for a test kit, old test kits go out of date.
Try some simple tests first, is it using salt, is the by-pass valve closed and depending on make is there water in the brine tank and lastly has the salt formed a platform in the bottom of the brine tank. If it has clean all the old salt out and replace with new.
RM
August 2011
howtomendit.com for free repair help, information and advice.
