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Most likely, the larger volume of air, and its greater speed at the high setting is sucking all the heat out of the heater core that it can deliver. That is, the higher airstream "dilutes" the warmth of the heater core.
The heater core may be clogged in the parts where the hot water runs through it. You could try power flushing your cooling system . . . on the cars I have had (Dodge, Plymouth) it was much easier (though not real easy) to simply replace the heater core, which on those cars was behind the glove compartment. If you look under the hood, you should see 2 black hoses going into the firewall near each other. That would be hwere the heater core is.
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Why does the heater in your 03 dodge ram blow cool air only?
i can turn the blower speed on low and the air gets warm , but not hot . then i can turn it to high and it get even cooler Check your thermostat, it may be stuck.
Why does your heater not blow out warm air?
if the heater does not blow out warm air change the setting.
Why does the heater not blow air?
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.
Why does your swamp cooler blow slow air?
Its not the air thats slow its you
How will the heater react if the heater core is stopped up?
Your heater will blow cold air only.
Why would a back heater blow cold air and front heater blow hot air in a 2003 Chevrolet Suburban?
The front expansion valve is clogged.
Why is your heater blowing out warm air in your 1990 buick regal?
Isn't a heater supposed to blow warm air?
How do you fix a heater that quit on a 1999 Chevy Tracker?
When you have the heater on, does it just blow any air at all? or no air?
Why would a house heater blow out cold air?
It doesn't really blow it out it just warms the cold air.
Heater on but not blowing warm air?
heater on at idle and will not blow warm air. when moving it blows the warm air from the vents. what will cause this
Is there a fuse that could be blown preventing the heater from producing warm air in a 2005 Chevy Impala?
If the fan is not blowing, a fuse may be the cause. If there is just not warm air being blown by the fan, check your coolant level in your radiator. Low level of water and coolant will cause the heater to blow cooler air.
Your heater fan is set to max but only blows out low heat?
The heater fan ONLY blows the air, it does not make the temperature of that air. Your heater temperature controls how hot the air is. Adjust your heater temperature for hotter or cooler air.
