Eduardbro

Hey guy, I got 1998 Mercedes C43. having a problem with heat - it either blow cold air or hot air. You can not make it warm. If you put the temperature all the way on high it blows hot air but if you put the temp one unit down it starts blowing cold air. Any idea what the issue is? I already tried to switch the climate control itself but it didnt fix it.
Is it the Temperature Sensor Fan? : http://www.fcpeuro.com/products/merc...sor-1408300008

Any help would be appriciatied

thanks