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My Jacuzzi J-365 is going into Watchdog error mode (3 dashes) intermittently. When I reset the power it runs fine for about 5 days, then goes to Watchdog again. I have tested the temperature and limit switches with an ohm meter and they are both reporting the same correct readings based on the temp / ohm chart I found on-line. I also checked the flow switch which is showing zero conductance when open and full conductance when closed (also visually confirmed open and closing at appropriate times). I have never found the spa to have overheated - always within a degree or two of my 103 degree setting. The circuit board "looks" fine - no bulging capacitors or any obvious burn spots. I don't want to replace the expensive board if not necessary but I don't know what other troubleshooting to do.
