I have a Saab 9-3 Linear 2005. When I am driving it, after a few minutes the temperature gauge moves up to the middle as usual.
The problem that I am having is that after driving it for a little while maybe 20 - 30, the temperature will start to creep up. I keep my eye on it as sometime it will hesitate for a bit, but then carry on to slowly move up to about 3/4, it will then sometimes go above 3/4 by a little, but the needle does not reach the red.
I normally leave it for a bit to see if it moves anymore. It does sometimes start to come back down the the 3/4 mark, but very slowly. At this time after leaving it for a bit, I usually turn the heaters on full so that the temperature goes back down to normal, as to not run the risk of it causing any problems.
Once I get out of the car the fan is on, so that seems to be working. I have also done a quick check of the coolant and oil level and they seemed to be fine, with no leaks etc.
When this happens I am usually on an A road going around 70 mph, this is on my route to work. I am not sure if the problem only occurs when travelling at speed as I have noticed it whilst driving to and from work, and haven't really done much town driving in the meantime, or just after a certain amount of time the temperature will start to increase.
If anyone knows what I could try or what the cause might be any help would be appreciated.