3 way Dometic fridge not cooling sufficiently - ideas?

[thedane]

3 way dometic fridge question:
We have a 2011 Fleet and a 3 way Dometic RM2193 fridge. Originally we were going to replace the fridge with a 2 way right away. But this one has actually worked quite well. Used it for the last 3 years, including a 65 day trip.
All of a sudden the fridge doesn't cool below 39 degrees on propane. Even when on max. Ambient temperature is NOT the issue.
We are well experienced in leveling, loading fridge, air circulation, the usual. Those are not the issues here.
Ideas?
We do not have the fan for the coils, as we never needed it in the past few years.

 

[fish more]

Make sure you have a nice blue flame, possible blockage

 

[thedane]

Make sure you have a nice blue flame, possible blockage

Flame looks good, from what I can see.

 

[thedane]

I should note that on 12v and 110v it cools just fine.

 

[pvstoy]

Clean the burner assemble and chimney for shoot, look for spiderwebs. Clean the orifice for blockage due to bad propane.

 

[billharr]

I should note that on 12v and 110v it cools just fine.

Clean the chimney.

 

[Beach]

Ditto all the above, I clean the burner with compressed air when ever the cooling falls off. No matter how good the flame looks prior to that, it always looks even better afterwards. Had to replace the burner with new last season as there was surface rust that had swelled and reduced the slot size.

 

[thedane]

Thank you all.
I am going to clean the burner and jet/orifice this weekend. Hoping that will help.