To troubleshoot this types of problem,click the link below :---Car heater blowing warm, but not hot air?http://schematicsdiagram.blogspot.com/2011/12/car-heater-blowing-warm-but-not-hot-air.html
-------- 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
----------- No heat on car? http://technoanswers.blogspot.in/2012/02/no-heat-on-oldsmobile-silhouette.html
------------ Heater blows intermittently and temp gauge goes erratic?
http://technoanswers.blogspot.com/2012/01/heater-blows-intermittently-and-temp.html
------------ Heater blows cold?
http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
--------- Heater/AC blower motor not working?
http://technoanswers.blogspot.in/2012/02/heaterac-blower-motor-not-working-on.html
------------ A/C, heater, defroster fan, not working? http://technoanswers.blogspot.in/2012/02/ac-heater-defroster-fan-not-working.html Heater problem?
http://technoanswers.blogspot.in/2012/02/heater-problem-on-isuzu-trooper.html
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This will help.Thanks.
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