suddenly i heard a strange noise coming out from the dash board like clicking then the tempreture meter jumped to 120 and above and go back to 90 then to so many positions, now when i start the engine the normal when cold is 70 instead of 0 and the normal when cold is 110 instead of 90 but the real tempreture of the car is normal so i think that there is something wrong with the meter so if any body faced such a problem before so pls advise.