I haved cleaned everything, even the contacts with CRC electronic cleaner. I've had the system for 4 years out of the weather. I can understand the cell getting used up, its design for that. But the control module? if your gonna replace the pcb, it seems more cost effective to buy a new control module. The internal components are too expensive. Does anyone have reviews on Jandy Aquapure. The replacement components are cheaper to replace if they ever go bad.