Goldline display 9900

Hi Nicko, welcome to TFP!
So, it went from reading normal levels and generating to reading 9900 and not generating over a short time? If the cell is 6 years old, it is likely getting pretty senile and might need replacing.
 
Thanks for the quick reply. I replaced the cell last summer and im still using the original controller box. Yes I started to see a change of color in the water one day and checked the box, and it reads 9900. I tested my water and had zero chlorine in it. I have a power light, but nothing else. I can scroll through the menu on the digital display.
 
OK, first thing is to fix the water chemistry, because algae growing can screw up a lot of things. It would be time well spent to take a read through pool school (button in the upper right corner of the page), especially the article called "how to shock your pool"
 
I have the exact same problem. Hayward salt generator reading 9900. The power light is the only light that is on and I am not producing chlorine. Would love to know if and how you solved your problem.
 
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