2002 jeep tj
I think i have something new with my heater. I noticed yesterday the when i am driving i have lots of heat coming up from my defrost vent and when i stop it stops. All my gauges work, i have heat on my feet, on the vents and when i put it to defrost lots of heat going through. But when i shut it all off and just driving, no fan on everything off i have heat coming up through my defrost vent. is this right? or do i have a vent door stuck.