check heater core could be clogged
Check the engine coolant level also.
*no, the heater relies on the engine for heat and when you drive the engine warms generating heat:)*
heater on at idle and will not blow warm air. when moving it blows the warm air from the vents. what will cause this
Sounds like a bad water pump, or belt is slipping for water pump. Low coolant, stuck thermostat, etc.
If the coolant level is okay, I would suspect a restricted heater core. Try flushing the heater core.
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, failed thermostat, partially plugged 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.
blow or blowsThey always blow out the candles.He never blows out the candles.
Only blows cold air with the a/c on while driving, your cooling fan or fan clutch is bad depending on the year, make and model.......... Only blows cold air with the heater on while driving, you will have a bad or broken internal a/c - heater control door.....
Poor circulation from a restricted/plugged heater core. Try flushing it.
The heater control valve is bad. Sometimes the dual heater control valve will go and the AC will blow full heat.
Will blow.
Any heater that only blows luke warm air isn't getting warm or hot water to the coil. This sounds like a problem with the thermostat not closing, and allowing the engine to heat the water properly for the heater.