my cars heating wont turn down no matter were the dial is positioned. the blower still works but even with them off the car is still roastin. im a taxi driver so too much heat and drunk people will soon spell disaster. i removed the dials panel below the radio thinkin maybe i could turn it down manually but no cable, just a wire plug and circit board. so iv run out of ideas. any1 know how to manually turn down the heating or wat is accually wrong with it. thx.