Hi everyone just a quickie please. I just had my Saab 900 AERO 91 serviced and had the thermostat and fan switch replaced. However my temp gauge that used to sit at about a quarter of the way up from the bottom then rise to just above halfway I hear a click and the fans switch on , now sits at the halfway point and doesnt move even when the car is static and the fans are running. Has the mechanic done something to it or is this normal. The reason I ask is cause Im paranoid about headgaskets Cheers in advance Bjorn.