Question about 1999 Porsche Boxster

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The heater will not function even after setting the temp to max of 85 degrees. There is plenty of air, but cold.

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Make sure plenty of antifreeze in the radiator and that you are not leaking fluid , with the motor running keeping all loose articles of clothing away from moving parts check to feel both hoses going into heater core the top and bottom should be hot if the top one is hot and the bottom one is cold you have a plugged heater core and flushing the system is required ..if both are hot make sure your vacuum lines are not dry-rotted and or cracked and that the vacuum line to the round ball under the hood is connected as well ....if so far so good you will need to access the inside under the dash and look see if the cable is connected and operating correctly it may have loosened while you turn the dial make sure the cable is actually moving the door there is a screw on top that has a bracket that holds it in place as well while yer there look to ensure the vacuum lines have not come undone ...i hope this helps you .

Posted on Nov 15, 2009

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