Have a problem with Heater when set on Cold and routed to the screen all i get is Warm/Hot air not cold..so mists up
There is no leaks under heater and cables look to be working that are visible at the side of the heater...
If i set to hot and route it anywhere but through the centre vents i get hot air...but not hot air through centre vents just warm/cold air.....

Any help appreciated