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Heater is hot when rolling, cold air when stopped?

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Many newer cars have a bleeder to allow air out of the cooling system. (usually a brass fitting or nut on the cooling lines hard pipe) This allows proper coolant level. Could be low on level check it again very thoroughly. Caution keep an eye on temperature gage till your sure of proper level. Insufficient fluid can give uneven heat performance.
Hope this helps.

Posted on Dec 11, 2009

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Posted on Jan 02, 2017

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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.------
Engine Overheats and heater blowing cold? http://howtobyme.blogspot.com/2011/11/engine-overheats-and-heater-blowing.html
---------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
-----------
This will help.Thanks.

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