Tell us how you started the fridge? On electric or on gas? How long did it take for the check light to come on? Instant or a minute or two?
Did the fridge work for a while then stop or did it never come on at all once you started it and had not used it on for months?
In order to reset the safety you have to turn the fridge off then back on. On your floor plan it takes a good look time to prime the LP gas. Start the furnace, it will purge the gas and when it starts heating then go try the fridge on LP. It may take a time or 2 thru the safety time out on the fridge to prime the LP line.
The fridge will work when it is cold out. I have camped in 19 F weather and the fridge still works.
If you are starting on electric only, and make sure the silly push buttons are correct for electric, they are really confusing which way is which, then the check light means something different as there is no LP gas.
I am assuming you have 120 VAC plugged in and the 12 volts are up? Yes/no?
Also for a sanity check make sure the Ground Fault protector in the bath room is reset and there is power coming out of the bath plug. Sunline did switch the fridge electric to not be on the GFI "but" ,maybe yours didn't get switched. If the 120VAC to the fridge is on that GFI and it is tripped then the element will not come on.
To rule all this out, go out and pull the white cover off the side. On your left hand side is a normal looking 120 volt black plug in a white single receptacle. Pull the black plug out and check to 120 VAC. Plug a light or anything in it to see if it has power.
You can see the plug to the left in this pic
I'll start digging in the service manual. The check light for sure on gas is the ignition failure/safety. But on electric that entire LP circuit does not work.
Hope this helps
PS. Did you have the Dometic safety recall done? There is a resetable saftey switch installed as part of the recall. I look in the service manual and report back. I thought the check light only worked in LP mode
Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
Google Custom Search For Sunline Owners Club