Friends, my car is a 2007 model 1.6 Partner and I had an engine replaced. Now the air conditioning button works when the ignition is on but when I start the engine the air conditioning button doesn't work. I went to 3 electricians, some said it was the wiring, some said it was the brain. It's not the button, we replaced it, it's the same. They probably didn't understand, they wanted 4B TL to replace the brain. Doesn't this air conditioner have a relay or fuse or something? It's probably a simple fault but they couldn't find it.