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Discussion Starter #1
Started noticing at stop signs or stop lights with heater on the heater starts blowing cool/cold air thru the vents, once leaving. the heat starts coming out. This is happening on my 2015, with 49k miles, just started noticing this issue. Where is the best place to start looking?

kc
 

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Have you recently had your cooling system serviced?
The level, and possibility of air in the system is the typical cause of this concern. Check the coolant level, and top off if needed. If you have recently had a radiator flush or any other cooling system service performed I would suggest taking it back to that facility and request that they bleed the cooling system. They may also be able to more easily identify any additional causes of the concern. Make sure it is someone you trust.
 
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