Do you notice this when your going up hills too? like it blows hot air if you have it on but if your not goin up hill it doesnt? i had the same thing when the gas pedal was down the heat would work and had to replace the reservoir for the coolant or something else check your coolant level too...just remember some cars run with different colored coolants than others
SOURCE: my heat don't work it blows cold air
Could be the heater core went bad, heather core lines are plugged, cover on the blower motor is off, or if your temp selector is cable, the cable may have seized
SOURCE: Weird problem, 2005 Kia Spectra5, after air
you may want to check and see if the cycling switch is defective...it engages and disengages the clutch on the compressor ..i would check and see if the clutch stops engaging when the a/c starts blowing warm
Testimonial: "Thanks this sounds like a possible solution, will have to get it checked out."
SOURCE: 2008 ford escape hybrid air conditioning not blowing cold
stopped up expansion valve in the line and or dirty accumulator
SOURCE: heater only blows cold air
Check your antifreeze level. if it is full, you have a bad thermostat. that is not allowing for the coolant to circulate.
Check if you have an inline valve in the rubber heater core hoses. They are the the black hoses that run to the passenger side of the firewall. Sometimes the valve can become damaged or stop working over time
NO HEAT ON FLOOR VENTS
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As
per your problem mentioned. There are few solved help links to
troubleshoot these problems. Go through the list and Click the link below:----
http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-no-heat-on-passenger.html
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http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
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http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html
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http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html
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http://technoanswers.blogspot.in/2012/02/no-heatblower-blows-only-cold.html
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http://whoisbyme.blogspot.in/2012/06/2009-mercury-grand-marquis-ac-blows.html
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http://schematicsdiagram.blogspot.in/2012/04/ac-not-blowing-through-vents-on-2007.html
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http://schematicsdiagram.blogspot.in/2012/04/passenger-side-temperature-is-warm-air.html
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These
will help.
Thanks.
As
per your problem mentioned. There are few solved help links to
troubleshoot these problems. Go through the list and Click the link below:----
------------
------------
http://schematicsdiagram.blogspot.in/2012/02/heater-blows-cold.html
-----------
http://repairhelpcenter.blogspot.com/2012/01/hot-air-on-drivers-side-vents-only.html
--------------
-----------
http://technoanswers.blogspot.in/2012/04/1992-toyota-camry-ac-control-light.html
--------------
These will help.
Thanks.
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