Hi Bulldawg, My Norcold 1201 had been giving me problems for the last 3 years. With having all the problems replaced - circuite board - thermistor - and recall box, I still had a cooling problem. Until I installed 3 fans in the roof vent. After install I had to turn down the temp from 9 to 5 and have never had a problem since. I know they don't have proper venting. This worked for me. The fans I used were NOCTUA - NF-F12 (2000 PWM). Was just outside of Yuma a few months ago and the temp was 105` and the sun shining on the left side all day, no problems with temp at all.