Hey guys, today on the way into work it was alittle cool so I turned the heat on, but while sitting at stoplights the air coming out of the vents would get coller, to ambient temperature. As soon as I would start moving again it would get warm again. Any ideas or suggestions on what to check? I'm not getting any steam on the inside of the windsheild and can't smell any coolant, and I have not seen any coolant leaks under the car. I just added Redline water wetter but this should not affect anything like this.