I Have a sundance cameo 880 series hot tub that has two mystery problems, that the service dept of the local dealers couldn't solve. The tub would go cold, with the watch dog error code displayed on the top side control. my local dealer and a independent repair person found nothing wrong. This problem continues and now the jet pump will not shut off from the top side controller. It was suggested that the controller was going bad, we replaced it and the problem hasn't gone away. Help Please.