2002 Audi A6. 3.0 , I had a issue with my economy button staying on. I swap a climate control module and now my ac is blowing hot. Also I notice my engine temp sensor is bad my engine temp sometimes comes up or stay on cold. Compressor is turning. Is there any progaming when swapping modules? And do I need to address the engine temp also in order to fix my AC?

 

Previous module was good. AC buttons will stay on if there is a problem with the AC. It turns out to be a high pressure switch was bad. And then I replace the eng coolant temp sensor . I had the system recharged and dye put in to see if there is a leak.