why doesnt my heater work on my1985 BMW
Low on coolant. Bad thermostat. Plugged heater core. Temp blend door inop.
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.
heater will not blow on a 1996 ford contour
if the heater does not blow out warm air change the setting.
Try Blower Motor Resistor. It would on the Passenger side under the dash
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.
Low coolant level? Thermostat not opening? Water pump not circulating coolant? Heater core airbound? Heater core plugged or restricted?
clean the heat filters
check the relays.If it doesnt blow air at all then check the blower relay or fuse
Your heater will blow cold air only.
The compressor is coming on because you have the heater set to defrost. Take it off defrost and the compressor will not come on. I would suspect the compressor is locked up.