I have an 307 from 2004 with digital ac. The ac works fine, but when the weather is hot and if the car have been standing in the sun the AC works randomly. It start and go for a while, stops and start after a few minutes and so it goes....and you can not adjust anything on the displaypanel. In cold weather no problem!There is enough gas and no leak. Have tried another displaypanel for the digital ac and a new cabin temp sensor. But still the same problem. Any suggestions?