I have IC40 that has yellow light and green light blinking. I have removed to do acid wash according to Pentair's instructions but no bubbling. I did see some scaling or some substance on the metal plates. I tried the acid wash and then tried some dish soap. Any recommendations on how to remove? Any good degreasers or is this cell done?
I have had the cell since June 08 so the five year mark is about here. I did hold down the Boost button and cell life indicates 4000.
Here is a pic: