I never trust a gauge. Unless the coolant is boiling, IT'S NOT OVERHEATING! If there's no loss of coolant volume from the radiator overflow, it's highly unlikely there's a real problem with heat. Testing the gauge, whether it's a direct-reading type or electric, should be one of the first things that's done if the routine fixes don't seem to be helping.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!