Need some advice.
basically my car is overheating. for the past couple of weeks whenever i sit (engine running) or in slow moving traffic the temp goes up to around 80 before out of the blue shooting up to 100+, the stop light then flashes and doesnt go down again untill i either turn the engine off and leave for 20mins or when i start driving properly again. what worries me as well is that the fan doesnt kick in. ive changed the fuse on the fan, checked oil and also checked the water/coolent level all of which are fine (replaced fuse just incase) but still getting the problem. i personally cant see it being the fan as ive had the car for 4 years and the temp always stays around the 70-80 mark without the fan coming on.
the fan itself hasnt seized and theres no leaking of the water or oil no tapping from the engine or anything either. so im a bit stumped.
the car is long over due for a service so would this have any effect on it?
any advice would be greatful + rep waiting too for the one with the answers lol. cheers