Ok here's hat my ac is doing after I replaced the system compressor, condenser, hoses an expansion valve it worked good then started warming up I replaced my temp sensor an it went back to normal now it only seems to cool when the truck is up to operation temp .it's I start it from cold it will not cool under the truck is hot , but another strange thing is it seems to work better in the morning than at noon an the ac compressor is always running even when its not cooling seems like as the day gets hotter the longer it takes to work. An freon levels r good I can only check it when its actually cooling. So any help would be great im at a total loss here.