heater is not working on my f350
Is the fan not working or is the heater not blowing heat? if fan is not blowing check switch and blower motor. If its not blowing heat, check heater core
1994 f350 diesel dually Fan works, new heater core Why No heat in cabin ?
How is your temperature gauge reading? Does it get hot? If not, your thermostat might be stuck open, flowing coolant to the radiator before it is warmed enough. If it is normal, than there may be a restriction in the lines to the heater core. If all checks out well, your blend door may not be opening. I cant recall if its a blend door setup, or a valve on the heater core inlet. If its not a blend door, then your heater control valve might have a broken line.
temp gauge is fine, fluid level is good, just no heat blows
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