Hi there guys, I have a 300 tdi disco 97 which has an issue with the heaters. When i brought the car, there was no heat, and after reading a few posts on here, I have flushed the system both ways and changed the thermostat, I now get hot air as long as i leave the heater on setting 1, if i try any higher fan speed, it goes cold.......... return it to speed 1, i get hot air again, but setting 1 is takes ages to warm up the car (about 30-40 mins) I have bled the system etc etc, removed the viscous fan, but have no idea whats wrong, Its almost as if the heater is cooling the engine too much at higher speed settings. HELP!!!!