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Q: What is causing your auto heater to blow cold air instead of warm or hot air?
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What causes the 10amp radio and heater fuse to blow in a 1990 Cadillac Deville?

short circuit in the circuit


Why does the heater in a 1997 Saturn SL series blow cold air?

In most cases when a vehicle heater that has been working properly in the past begins to blow cold air the cooling system is low on coolant. It could also mean that your heater core is clogged. A good coolant system flush might take care of this, otherwise you may have to have it replaced.


What vabrates on a flute?

The flute vibrate when you blow air across the embrochure, causing the air to vibrate inside the flute which causes the sound to come out the end of the flute.


What is blow back on 1990 Jeep Cherokee Laredo?

blow back or blow-by is pressure that builds up inside the engine causing oil to be blown out of vent,oil stick,oil filler cap, or into air breather.. Causes of blow-by ---- Bad PVC valve (Positive Crankcase Ventilation ) Worse case is worn piston rings or cylinder walls - engine needs to be rebuilt. http://en.wikipedia.org/wiki/PCV_valve


Jeep Cherokee heater does not blow hot air?

with any no heat complaint the first thing to check is going to be the coolant level. then make sure the vehicle is reaching proper operating temperature and that the thermostat is not stuck open or anything. from there check and see if both of the heater hoses are getting hot, those are the coolant hoses going into the firewall towards the passenger side of the vehicle. if one is hot and the other is cold that means you have a restricted heater core. you can try to backflush the heater core by taking a garden hose and connecting through the outlet side of the heater core and spraying out the inlet side. if that does not work you will have to replace the heater core. hope that helps.

Related questions

What is causing the heater to blow cold air in 2002 Mercury Mountaineer?

you would have to see a mechanic about that problem


Your heater will not blow on your 1996 Ford Contour?

heater will not blow on a 1996 ford contour


Why does your heater not blow out warm air?

if the heater does not blow out warm air change the setting.


Why does the heater not blow air?

The heater does not blow air because it emits infrared rays that have heat molecules within them, thus releasing heat, not blowing it. A heater does not blow air becasue there is no moving air source within the heater. The heater emits infrered rays that cause heat to slowly flow out of the heater.


Why does the heater stay on 1998 bravada the heater is in the off position but still blows?

MaybeYou may have it on "auto" not off check all switches off You may have a faulty selector switch. Also some vehicles always blow heat even with the heater off.


Could a mouse build a nest in the heater box and repeatedly blow the resistors?

Definitely. answer yes the mouse has probaly also chewed thru wires causing a short


How will the heater react if the heater core is stopped up?

Your heater will blow cold air only.


Why is the coolant temperature hot and the heater is blowing cold air on a 2001 beetle?

coolant level could be low not letting it circulate through the heater core, causing it to blow cold. Also, if the coolant level is low it will in turn overheat.


Why does your heater not blow hard on 2004 530i?

why doesnt my heater work on my1985 BMW


Heater does not blow hot all relays are good?

Check the thermostat or heater core


Why would a back heater blow cold air and front heater blow hot air in a 2003 Chevrolet Suburban?

The front expansion valve is clogged.


Why does the heater blow heat while driving and cold at idle?

you need to replace your heater core