Just recently noticed this weird smell coming from the vents when I turn the fan on. It's not the typical musty smell from the ac nor does it smell like coolant. The closest thing I can describe it to would be a fried electronics board or a light burning rubber smell. When I turn the ac on it has a strong smell in the beginning, but goes away after a few seconds. With the heat on it does the same thing except the smell lingers. In direct sunlight, I can see some type of light fumes coming from the vents near the windshield only when I first turn the heat on. I felt around the footwell carpet and did not notice any type of wetness. Is there any way to tell if it's the heater core without ripping the dash out?