I have a Intellichlor IC40 and an Intelliph system hooked up to my pool for just over two years (pool is 4 years old. IntelliClor was installed with original equipment, I added the Intelliph 2 years ago). Last fall (October), I received a COM Link issue on my IntelliTouch panel under the diagnostics screen, and the "status" light on my Intelliph was red. When I opened the Intellichlor power center, I could smell a "burnt" smell. Upon visual inspection, I could see heat distress on some of the components (R13 on the DT+ terminal in picture) on the printed circuit board (PCB). I ordered a replacement, did an exchange and everything seemed to be functioning properly. However, the status light on the Intelliph was still red. I removed the panel from the intelliph and also saw some heat distress on the board (transistor bank to the right of RL 1) and one one of the connector pins (top row, third from left in photo). At this point the IC40 was working, so I disconnected the Intelliph and just ran the Intellichlor while I waited for a replacement panel for the Intelliph. I waited to install the new Intelliph panel once the weather warmed up and had the need to add acid. I installed the new panel in May and everything was running fine. After a few days, the COM Link issue reappeared, and I found the same issues on both the IntelliChlor and Intelliph boards. Pentair stated that it was probably a power supply issue, and that since my IC40 was ~4 years old, that it could be the issue as well. I replaced the Power Center, the IC40 and the Intelliph panel at the end of May. Within a few days, the COM Link error returned, and again both boards were fried! The only think I haven't changed is the motor on the Intelliph tank and pump assembly and the cable from the Power center to the Intelliph panel. I have replaced the PCB in the IntelliChor power center once again, but have not reconnected the Intelliph system. The system will run fine unless I hook up the Intelliph. I'm running out of parts to swap (money as well) and am looking for ideas. Pentair told me to change the power center again, which I don't plan on doing. They also don't seem to attribute any root cause to the Intelliph system, but that is where I believe the problem resides. Thanks for your time.