Take a step back Simon, the demist test, would it not all depend on what the mechanic had done to create the switch on the dash? If he has bypassed and isolated the normal fan control creating a power source for the fan via the dash switch then the demist test is going to be academic.
Mohammed, I have to agree with Simon (SD1too) about replacing the car. You know the problems with the car you have and through this forum you are getting solutions to them. Buy another car chances are you will face problems with it as well. Head gaskets, if they have been replaced how long they last depends a lot on the quality of the work done. Low mileage doesn't automatically equate to a better car, it all depends on how it has been looked after.
One thing I would suggest is get the car to someone who knows the cars, the fact your mechanic hasn't cured the overheating, merely side stepped it by bypassed the fan controls suggests he doesn't.
Last edited by stevestrat; 10th August 2014 at 13:03..
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