I have an AquaRite Salt Chlorinator in which I had to purchase a new T15 cell. My cell didnt quit working, it was leaking water at the seems. So that was $469.00. Then when I tried to get a reading on the lcd, it was stuck on the same numbers when I turned main switch box on and off.
I called the manufacturer and all they told me was to call there guy in my area. I did and he no showed, then he got an attitude with me and told me it may be a week or two before he could help me.
I'm a DIY guy. So I read the forums online. I followed what I read.
I opened the main control box, took out the motherboard and found a burned spot at the upper right hand side. At the burned site was attached what I learned later what is called a thermister, its about the size of a quarter and brown in color. I barely touched the thermister and it crumbled. Since I didnt find any other burned spot on the board, I was able to find this part from an online electrical supply company for $2.50, so I ordered two of them and received em in two days. shipping cost was about $7.00.
I took this motherboard and the thermister to a good friend of mine who knows how to solder small items. He soldered this thermister to the board in about 5 minutes. I then beat a path home to see if this was really going to work. I put it all back together and it worked, yes it works.

I SAVED OVER $600.00!!!!!!!!!!!!!!!!!!!!!!!!!!!!!