Engine Cooling problem
1997 Renault Clio 4 cyl Front Wheel Drive Manual 112569 miles
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my car starts getting a bit hot and the fan kicks in but it doent seem to cool the engine down, to cool it down im having to turn the heater in the car on full just to get the temp down, why is this? the water seems to go down quite quick but i cant seem to find any leaks anywhere? also i get a yellow warning light on when i start the car but it goes off after a few seconds. its and square box with a zig zag line through it, could this be to do with the fan? also when the i first start the car in the morning when the engine is cold the revs go mad going up and down and when pressing my clutch it stalls why is this? thanks