atwood heater

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I have a 2016 atwood heater in my toy hauler that won't turn on when its below 60 degrees. works fine over that temp, you can hear the t-stat call for heat but nothing. Has anyone experienced this problem? if so what was the fix?

 

[Bobtop46]

Some smarter folks will be along shortly with better answers hopefully. 

Best guess is that when the temp drops that things contract with the cold maybe causing a bad connection somewhere.  I would one by one disconnect each connection on the water heater clean it and reconnect it.  Hope this helps solve the issue.

 

[Gary RV_Wizard]

Does the furnace fan start? It sounds as though the circuit board develops a internal short or open when the temperature changes. Unusual, but possible.  Could also be a corroded wire connection where the wire harness joins the circuit board.  Some recent model Atwoods have had a problem with rain water entering via the outside access door and damaging the circuit board or connections. 

Please read my article on Furnace Troubleshooting in the RVForum Library at http://www.rvforum.net/miscfiles/Furnace_Trouble-2.pdf