Hi All, on cold days (even in the 20's), my 2015 accord simply will not warm up and start blowing warm air to the front defroster until the car is driven for a while. The temp gauge just won't move if the car is left to idle. I brought it to be checked and they assured me it was all working fine. My 2010 accord would warm up in all winter conditions and blow warm air just sitting in the driveway idling, but not the 2015. I think the thermostat is stuck open. Any thoughts? Is it just normal for this car not to heat up while idling?