My citroen keeps having the temperture light coming on, although the gauge is only at half way and not overheating.
I have checked with a mechanic and he said my heater has a leak draining the wter which is causing the problem and he can fix it soon but will be fine to drive as long as I don't use the heater.
Used the car this morning and light came on again, although the heater wasn't on. Decided to turn the heater on and turned it off within 5 seconds which dropped the gauge and turned the light off,

Any explanations?