franndan Report post Posted November 14, 2012 We have a 1998 National RV Tropical with two Dometic A/C units and one heater. The 4 button Comfort Control unit buttons work intermittantly and one button no longer works at all. Dometic no longer makes the older control unit. I remember there was and article in FMCA mag. about a relatively easy fix but don't remember details. Can anyone help. Share this post Link to post Share on other sites
dickandlois Report post Posted November 16, 2012 I do not remember the article, but this link might provide some the information and help. http://bryantrv.com/docs2/docs/ccc.pdf Rich.. Share this post Link to post Share on other sites