Elevated Fridge Temp Issue

Well my feeble attempts to clean the burner box must have pleased the RV fridge gods at least for awhile. Tapped on the round duct attached to the top of the burner box and some very fine particles fell out. Vacuumed them up and shot compressed air up the big tube attached to the top of the box and a much smaller opening. It did not look like what I expected in side the burner box. Put the cover back and turned it back on in gas mode and it lit. Fridge temp continued to go up by a degree over 15 min or so after turning the unit back on. Concluded I had not helpd the problem. Found a mobil RV tech that could come out today and went off to run last minute errands. Got back home and temp was down to 38 and decreasing. Tech arrived late afternoon and adjusted the burner because flame was a little to big and had a little yellow tip. Outside temp was 99 today. Wife loaded all the food back in the fridge tonight and set the A/C for 75. If it is still good in the morning we will be leaving for the Smokies. Hope it continues to work. Thanks for all the input.