Because the air blower switcher was worn off for all the switch positions but high. It's cause by the fact that people usually don't use the high setting
No one knows if:The heater is NOT blowing - or blowing on high speed only, or... The heater IS blowing, but the air is NOT hotEither way, the "Related Questions" below will get you started
air is blowing bat problem is no air com to front only in class
Coolent leaks from pasenger side of engine.
Turn it on high
blowing cool air, is the air only in your mouth... warm air comes from your lungs. temperature also varies by how open your mouth is while blowing air out
Is it blowing cold air only or not blowing any air at all.
Jetstream
NVM
Check the temperature control cable
Blower resistor must not be functioning properly. It should be replaced
jet stream
monsoon