bja1234 Posted March 18, 2015 Report Share Posted March 18, 2015 Have a Duo-therm comfort control thermostat (5 button) with 2 air conditioners and a furnace. Have not used the ac for a while. Zone 1 I turned on the ac set the temperature and the ac came on as normal. When I changed to zone 2 there was no display except for the "2" indicating zone 2, also the backlight was lit. I then reset the thermostat per manual by turning thermostat off, holding down zone and mode buttons and then turning the thermostat on. When the thermostat rebooted only zone 1 is now available. What next? Thank you. Link to comment Share on other sites More sharing options...
Wrknrvr Posted March 19, 2015 Report Share Posted March 19, 2015 The first thing to do would be to unplug your communication cable from the thermostat, then plug it in again and then try to reset the thermostat. I have found bad ends on the communication cable and just install a new end and it has fixed some with that problem. They should sell the tool and ends at lowes or Homee Depot, but just make sure you install the cable the same way it was on there . most of those cables will have a edge on one side so you can tell if it is correct. the next thing would be to find another thermostat and plug into your communication cable and try to reboot it. If that does not work then install another communication cable to the main AC unit and reboot the thermostat. Thanks Vern Link to comment Share on other sites More sharing options...
Kirk W Posted March 19, 2015 Report Share Posted March 19, 2015 If it were mine, I would first visit Bryant RV's website and download a copy of the Dometic trouble shooting guide and see if it has any helpful hints for the symptoms that you have. Good travelin !...............KirkFull-time 11+ years...... Now seasonal travelers.Kirk & Pam's Great RV Adventure Link to comment Share on other sites More sharing options...
Mike and Claudia Posted March 25, 2015 Report Share Posted March 25, 2015 I just had a similar problem with my 4-button model. 1st--As suggested, plug and unplug the "phone" type connector 2nd--Get a can of electronic spray and spray the connectors and the buttons super well 3rd--If none of the above work, see: http://www.rvnetwork.com/index.php?showtopic=116268&hl=thermostat This outlines what I did and who I contacted. Mine is now working very well. Mr. Hendrix was a pleasure to work with and knows what he does. Blessings! Traveling America in "God's Grace" Link to comment Share on other sites More sharing options...
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