Hi there - an interesting problem has begun with my Blue Essence SWC system. I recently noticed the display reading "cold" and the system won't generate. The system is set to the T-5 cell setting and operates on about a 15,000 gallon rectangular pool with attached spa. My water temp reading on my heater is about 74 degrees (I live in Florida), and i noticed the readout on the Blue essence jumps around and ends up as high as 103 degrees. My guess is that the temperature node on the inside of the cell is not working? I had my cell tested at the local pool supply shop and it checked out OK. Was wondering if anyone has encountered this problem and knows a way to troubleshoot without replacing the entire cell.