2014 Mirage ES,CVT. Condition set: Auto climate control ON, AC OFF, temp set at 74 F, ambient ~40 F, fan at one or two bars, idling at a stop. Occasionally, there is a pretty strong smoke smell coming from the heater when idling at a stop light under the above conditions. Smells like burning dust on a resistance heater after a long layup. Anyone else experience this condition? Cause?