Fridge will not run on propane

You can use the search function from this forum which will access a lot of cures for fridge operating problems on the gas mode.  Mainly there is an obstruction in the gas line/orifice which has to be cleaned out.  Hope this helps. 

If you have a compressor use an air gun to blow out the combustion area where the flame is, if not purchase a can of compressed air and do the same, in most cases this should address the issue you are having.  Also, if you haven't already done so either purchase a screen set or get some screen from your hardware store to close off the large openings on both panels located behind your fridge and accessible on the outside wall.  If it hasn't been done bees, wasps, spiders or similar can build nests or webs either around the combustion area or inside the cooling stack just above the combustion area.  Blow both areas with compressed air - hopefully you will be back in business.