Hello, on my 96er omega 2.5 td the air conditioning system does not work properly. the thermostat is new and the cooling water temperature is also jerk back to 92°. the first 30-60 min it is also nice warm in the car, only then it becomes cooler… if you want to have warm air again you have to put on HI, otherwise only cold air comes out. the outside temperature sensor is new…I think the fan (sensor) in the air conditioning unit is defective, does not suck in. how can you fix this? does it even work? then what, have tried to repair my on-board computer (because of pixel errors)… now it is completely scrapped. need a new one, can I take anyone for it and reprogram it at foh or does it have to be another one from 2.5 td? mfg frank