Question about 1997 Chevrolet S-10 Pickup

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I'm have problems with my heater. I usually blow very hot air and has always been a good heater. Lateley, it still blow air but seems to be cooler. Could it just be the thermastat?

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First,check coolant level in radiator,if it is low you will have colder air on heat mode! Replenish as needed and in reservoir as well.Drive and test! Change the water thermostat if this doesnt help! Check water valve next,at the heater core inlet hose! The hose going in should be hot, and the hose comming out also,but not as hot. Check to see if the water valve functions or moves when you select heat from a/c mode! Is the vacumn line hooked up to the valve?

Posted on Sep 08, 2010

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