I only get heat from the heater when max temp is selected on my Mazda 3 Sport, why?
Sep 13, 2012 at 11:50 PM
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HMAC300
AUTOMOTIVE REPAIR CONTRIBUTOR
48,601 POSTS
make sure it's full of coolant first then check to see if there is a blockage if both hoses are about the same temp then you may have an actuator in the heater box broken.if this is auto temp control -like you set the temp then get it diagnosed what is wrong with it as it can be a sensor or anything.