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Message: <blockquote data-quote="Andy" data-source="post: 1433698" data-attributes="member: 210983"><p>Brand new thermostat, back flushed and flushed heater core about 6 times, blend door moves just fine but i'm not sure if the door closes all the way, airflow coming out is great(just cold). I've even tried installing a valve on the coolant line that allows the coolant to bypass the heater core so i could decrease the flow through the bypass. I've checked all these things and yet still no heat, any ideas?</p></blockquote><p></p>