Frig not cooling properly?

I started mine last week before going out for the weekend. I was at 50 in 105 temps outside and inside of trailer was 102.I decided to switch to gas because I thought it cooled better on gas. I went in on Thursday it was 60. I pulled off the outter cover and secured a small 9 inch house fan at the base of the fridge to blow air up through the coils. I also put a big bowl of ice in the fridge to help it cool down. I went back 3 hours later and it was down to 42. once I loaded cold things in it it maintained 38 all weekend long without the fan. If you don't have any cooling fans on the back of the fridge you might want to try this first to see if your temps will go down before doing anything major. Just a thought.