The thermostat could be stuck open.
When you have the heater on, does it just blow any air at all? or no air?
Because your thermostat is probably stuck open
heater will not blow on a 1996 ford contour
if the heater does not blow out warm air change the setting.
Low coolant. If the coolant is low then the heater core is not able to transfer heat in to the car.
if it doesn't heat your heater core is most likely clogged and if it doesn't blow at all then the blower is messed up.
The heater does not blow air because it emits infrared rays that have heat molecules within them, thus releasing heat, not blowing it. A heater does not blow air becasue there is no moving air source within the heater. The heater emits infrered rays that cause heat to slowly flow out of the heater.
if this system uses dex-cool flush the system
Check to insure that the engine coolant is full and the thermostat is not stuck. Without the heated fluid from the engine the heater will always blow cold air.
Your heater will blow cold air only.
Thermostat stuck in the open position. Replace the thermostat.
why doesnt my heater work on my1985 BMW