Thread: Heater problem
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Old 11-07-2009, 07:44 AM
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Its still possible that the themostat is bad(in this case possibly stuck open), even though the truck reaches N.O.T. causing your case of just blowing the cold air...Check the hoses that run from the thermostat, and the heater core to see if they are hot or cold...They should be hot(or fairly warm anyway)...Now if your coolant is at the proper level in the RAD and reservoir(without any leaks from hoses, and the RAD), the thermostat is working properly and its still blowing cold air, check to see if you have a leak inside your truck or a strong smell of coolant coming through the vents, then thats a good indication of a bad heater core...
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