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Why wont your heater change from feet to defrost but blows out hot air still?
Wiki User
∙ 13y ago
most likely your heater controls run via vacuum lines. cracked or broken lines could cause this.
Wiki User
∙ 13y ago
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Why does ac and heater on 2000 f350 blow air through defrost when another position is selected ac clutch clicks and air still only blows through defrost?
You have vacuum line leaks somewhere.
Chevy 95 S10 heater inop blows cool air?
Heater core changed three years ago,I changed Thermostat Heater still blows cool air.
Will the heater core still leak in a 97 c 1500 if the heater or defrost is not used?
Yes it will, engine coolant still flows through it when engine is running.
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sounds like the vent door that changes the air from defrost to heater is jamed its a little metel door like a flap.follow the cable from defroster switch and you should be at the door,its a manual door
What causes cold air to come out of air vents when heater not on?
The heater may not be on - but the fan still blows air through the vents when they're open !
1986 jeep Cherokee 4.0 you have replaced the heater hoses and a new heater thermnostat is on It still over heats When you turn the defrost on full blast it cools down What else should you do?
bad fan clutch, clogged radiator.....................when you turn the defrost on, the heater core is acting like the radiator...............good luck, Mike
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VENT TO HEATER CORE IS NOT CLOSING................
1994 Chevy truck heater diagram?
not getting heat into cab not even enought to defrost windows i have changed the heater core an thermostat an back washed the core and still nothing
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blower motor resistor
In your truck when you switch from cold air to heat the air still blows cold?
Interior heat uses the engine heat. If the engine is still cold, the heater will blow cold. If the engine is warm and the heater is blowing cold, you have a problem with the heater. Check the water in the radiator and see if it is rusty. If it is rusty, change your coolant, thermostat, and hoses. Look at the heater hoses when someone steps down on the gas pedal. If a hose collapses, replace your heater hoses. Otherwise take it to a mechanic.
You just replaced the thermostat on a 1993 ford ranger but your heat still blows cold air what else could it be?
The heater valve may not be engaging or the heater core may be blocked.
I recently bought a 1992 Grand Prix and the heater died but the rear defrost still works Any suggestions?
The rear defrost is electric. The heater works off the hot water in your radiator running thru it and a fan blowing the heat into your compartment.. check your thermostat, it could be that your heater core isn't getting and water to it, that is were your car get's it't heat from, if not that it could be lack of water
