RV Repair: fridge too cold when running on electricity, soda cans, blue flame

Question
I have the temperature set on my fridge so that it is the right temperature when it's running on gas.  When I come home and run it on electricity it gets too cold - food freezes, soda cans explode.  Any ideas on how to fix?  This is something that just started to happen - it was working fine a few months ago.

Answer
I have had several different types of dual source fridges but they all had dual thermostats, I have had trouble getting them to work the same and it usually came down to an adjustment or cleaning. I would check the vents for trash and or dust, make sure the flame is burning correctly ( blue flame with very little orange ) It sounds as though the propane side is not working correctly.