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.
heater on at idle and will not blow warm air. when moving it blows the warm air from the vents. what will cause this
Your heater will blow cold air only.
if the heater does not blow out warm air change the setting.
you may not have the heater water hoses plugged in
replace front heater corefront and rear have independent heater cores
You are low on coolant to the heater core.
Probably need to add antifreeze. Check the Radiator not the overflow tank. If you are low on antifreeze it will not circulate through the heater core.
Could be the Climate Control Unit or Clogged heater core.
Thermostat and/or heater core may be defective
check your coolant level
Low coolant in the system. Defective heater control valve. Clogged heater core.