Refrigerator Issue - ammonia smell

After going through the ordeal of cleaning out combustion chamber, heat stack and then poking a small hole through a plugged orifice I felt reasonably happy with the fridge in our 2011 177, temps going up to 44 during the day (outside temps in low 80's) and now not exceeding 41 during the day (but outside temp is only 72) and at night the fridge temp drops to 34 and that is at a setting of 3 out of a possible 5 dots.

Recently I have smelled a really odd smell, something I never smelled before.  My neighbor, who has sold travel trailers for years said it is ammonia as he said it was burning his eyes.  It has been this way for the past 10 days, still cools well but the smell is not a welcome one.  I was told that it is on its way out by my neighbor and there is no way to replace the gas inside the system.  So do you all agree on this one, am I looking at purchasing a new Dometic fridge?  The build date on it shows June 2010 and yet I think that over the 9+ years of ownership the unit has maybe 13 or 14 months of continuous use.  If our refrigerators at home lasted that short of time there would be war in the camp.  Also recommend looking at Amazon or E Bay or going direct through to Dometic to purchase a new one?  Thanks for the replies.

I would be leery of getting a refurbished or remanufactured cooling unit. What are they actually replacing? How do you know there isn't corrosion somewhere else in there that will open a hole quickly? Also, the cooling units aren't the only thing that fails in these, the circuit boards eventually have problems too, and they are either horrendously expensive to replace or unavailable. If you buy a new unit you can cannibalize the old circuit boards and either keep them as spares if they will fit your new unit or sell them here or on ebay to recover some $$. 

If you can get by with a cooler, you might want to wait a few months to buy and get a better price, right now there is a backlog I'm sure due to the busy (and Covid delayed) camping season.

We also replaced our fridge.  As Lostagain says , the area around the edges of the fridge need to be addressed. I used a can of expanding spray foam and it worked great. when you first use it, it looks terrible!  It expands a LOT-and squirts out everywhere.  Once it dries, it is easy to cut off the excess and makes a nice seal.

Save as many of the parts(shelves, thermister, burner parts, gas valve/gas line, exhaust fans, etc) as they are really expensive and hard to find

Good luck

Vann