JRTJH- I realize Whmartini’s is a 2017 but my 2015 316RL had a similar problem and I even repalaced the lower primary circuit board with no luck only to discover there is a thermal fuse on the vent stack that the 12v primary power goes through before hitting the main circuit board. I actually got the replacemt fuse for free from Dick Gores Rv (Good people over there) in Richmond, Ga (right outside Fort Stewart) because they said it was a recall fix from Dometic and the techs would always take that one part from the kit. It looks like a resistor that may or may not have a tiny button to push - the whole thing is about the size of a quarter and if there is a button and you can’t push it, replace it. If there is not button, replace it too. It sat about 3-6 inches up from where the burner assembly is on the fridge.
I think I also found it on amazon or somewhere for $20 bucks - glad it didn’t have to buy it! I replaced it (with the old circuit board) and it all worked fine! Took me a weekend to diagnose and research - this was before I know about this forum. I saw a similar post recently about the exact problem tha I’m talking about- May not be Whmartini’s problem, but his symptoms sound very similar.
Here is what I replaced on mine - thermal fuse:
https://www.walmart.com/ip/Dometic-3...Fuse/107429729http://https://www.walmart.com/ip/Dometic-3850306063-Thermal-Fuse/107429729?wmlspartner=wlpa&selectedSellerId=1636&a did=22222222228062421042&wmlspartner=wmtlabs&wl0=& wl1=g&wl2=m&wl3=169612349673&wl4=aud-481962823846
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