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Why would my heater blow only hot air regardless of temp setting?

(2006 Mercedes-Benz S350)
in Tacoma, WA on March 28, 2012
AC still works on LO setting
Displaying 1 answers & 2 comments
Popular Answer
of Greg's Orange Auto on March 28, 2012
possibly an air door actuator that is stuck or broken blend door. u have like 6 or 8 in your car.
on March 28, 2012
thank you for your response is this something i could possibly fix myself od is this a trip to the dealer
of Greg's Orange Auto on March 29, 2012
well 1st you need to determine which ome is bad then depending on location it could be an easy one or a 5hr job. i rec at least spend the $ for a diag then see what they say. these can be difficult to change if its a hard one
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