05 6.0 heater blowing cold air
#1
05 6.0 heater blowing cold air
My 05 is blowing cold air out of heater after it is warmed up. At an idle it blows hot but after you drive a few minutes it blows cold. Under accel it will also cool right off. Today driving home in the bitter cold, cruising on hiway, blowing ice cold I pulled over to check heater hoses. Ice Cold, yet temp gauge normal, degas normal no venting. HG's changed with studs, EGR cooler checked, new cooler, new injectors. Ongoing now for a couple years. No summer heating issues. Very Confused. Help. Could it be thermostat?
#2
My 05 is blowing cold air out of heater after it is warmed up. At an idle it blows hot but after you drive a few minutes it blows cold. Under accel it will also cool right off. Today driving home in the bitter cold, cruising on hiway, blowing ice cold I pulled over to check heater hoses. Ice Cold, yet temp gauge normal, degas normal no venting. HG's changed with studs, EGR cooler checked, new cooler, new injectors. Ongoing now for a couple years. No summer heating issues. Very Confused. Help. Could it be thermostat?
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Could be a vacuum leak. Check heater control on heater hose above passenger side valve cover. See if you can move the lever by hand. Watch the control while an assistant turns on the heater to see if it moves and check the gray vacuum line with a vacuum gauge.if your not getting hot air the control is probably staying closed,I'd wire it open until the weather warms up and tackle it then.
#15
Yours doesnt sound like a vacuum problem to me. Check coolant level, possible reasons for yours is water pump impeller is broke, thermostat, blocked heater core, head gaskets.
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