Air Conditioners and Really Hot Weather

Older Tiffin's including your Year model had the same problem with the 20 amp breakers tripping in extremely hot temps. It was compounded by the fact the Breaker panel was in the REAR Closet right above the engine. You had 2 things causing the trip--extreme heat when camped and the Heat from the engine compartment while in transit So, Tiffin stated that going to a 25 amp breaker would not cause any harm. I have done probably a dozen Tiffin's and replaced the 20 amps with a 25 amp and the problem went away. They also recommended that a return and cold air exhaust vent be installed in the rear back wall closet which we did. The 120 wire is 12 gauge and you will not have any safety issue with replacing with 25 amp breakers. Where is your 120 breaker load center located in your RV? Doug