Question about 2000 Hyundai Elantra

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Heater will not blow hot air but does blow cool air

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Check water level in the radiator (when cool or cold) if there is not antifreeze in the overflow then your running low fluid in the system

Posted on Nov 06, 2010

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Posted on Jan 02, 2017

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Heater temp on high only bows luke warm air after driving. A/C works just fine.Plenty of cold air from it


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Why is My Car AC Blowing Hot Air? - BlueDevil Products

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Jan 27, 2016 | 2000 Chrysler 300M

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Fan blower blows cold and hot air


most likely a stuck heater tap,but may involve vacum or elec controlled trap doors in HVAC system

Mar 15, 2015 | 1999 Dodge Dakota

1 Answer

Heater not blowing hot


My 2006 f-150 4.2L 113,000 miles heater blows cool when at Idle ,But when driving the heater blows hot. Change thermostat change water pump change the Rad. change the blend door motor
flush the block bleed the system add new green coolant. After all that still blowing cool air at Idle. What is causing this problem.

Jan 03, 2014 | Mini Cooper Cars & Trucks

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Why wont the heater blow out hot air in my 1995 pontiac bonneville. it will only blow cool air


If the heater hoses are getting hot, the problem may be a faulty blend door under the dash. The blend doors direct air thru the heater core and the vents.

Oct 12, 2012 | 1995 Pontiac Bonneville

2 Answers

Why would my heater blow out cool air when sitting still and then hot air when going down the road and then it's not all that hot


Try flushing or blowing high pressure air through the heater core lines. its sludge build up and need to be flushed through heater core only. check antifreeze fluid level. only put in straight antifreeze, do not mix. most people do not know what mixture should be, so be safe and add straight, it will not hurt it, i run 100% straight antifreeze and never had a problem or worry about it ever freezing and cracking my block, heads or radiator cracking.

Jan 29, 2012 | 2001 Daewoo Nubira

1 Answer

Heater core is working properly but car will not blow hot air only cold air i am thinking the flapper that controls hot \ cold is stuck in the cold air position


To troubleshoot this types of problem,click the link below :----http://howtobyme.blogspot.in/2012/02/heater-blows-only-from-defrost.html
--------Go through the procedure to confirm the issue.

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Engine Overheats and heater blowing cold?

http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html

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Heat blows cold on drivers side and hot on passenger side?

http://schematicsdiagram.blogspot.com/2011/12/heat-blows-cold-on-drivers-side-and-hot.html

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This will help.Thanks.

Jan 25, 2012 | 2001 Buick LeSabre

2 Answers

When the car is idling, the heater blows out cool air but when the car is moving, the heater works fine


When the coolant in the heater core is hot from the engine and your fan is on hot air will blow through the hot fan coil, i figured it out, when i stepped on the gas i could here the coolant squeezing by the control or limiter valve, because the higher rpms make the belt spin faster which makes the water pump pump harder causing more pressure, so when u idle that hot coolant will cool down from the fan blowing on it, u need to find the control valve and open it up to full blast, then hot coolant will always be flowing through your heater coil. ;)

Dec 17, 2010 | 2008 Pontiac G6

1 Answer

Hot air blows but cools down in 15-20 seconds.


You likely have a restriction in the heater coolant hose circuit - perhaps a coolant control valve not fully opening, or a kinked hose.
Insufficient coolant volume is flowing to keep the heater core hot.
Try back flushing the heater core system with a garden hose to check flow.

Nov 13, 2009 | 2003 Audi A4 Cabriolet

1 Answer

Air conditioning blowing only highest setting but HOT air


Sounds like your freon has leaked out and your heater blower resistor is burned out. Deffinitly take this to the dealer.

May 20, 2009 | 2001 Honda Odyssey

1 Answer

My 91 cadillac devile has no heat , just cool air blows even when


The heater in your car depends upon a flow of hot coolant going through the heater core in order to get hot air into the car. If the heater core is partially plugged, it will restrict the flow. If you have a head gasket that is putting exhaust into the cooling system, it will eventually get into the heater core. When this happens there is no coolant in the heater core to make the air warm. If the water pump vanes have corroded away the result will be very poor coolant circulation causing the heater to not blow hot air. If your car is equipped with a heater control valve that is not functioning properly, the coolant flow will be restricted. One or a combination of these factors is likely the culprit in your case.

if the car is not overheating, the thermostat is working fine.... replace or flush the heater core multiple times to try and eliminate sediment build-up.

Jan 14, 2009 | 1991 Cadillac DeVille

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