because when you stop the motor is hot from driving but when you drive it is cool because you are moving.
Your heater will blow cold air only.
Your coolant level is low.
the heater core was stopped up just flushed it out ok now
It is probably a Dodge. Consider yourself fortunate that it even runs.
Needs a recharge
It doesn't really blow it out it just warms the cold air.
If it does blow just not cold air you should see if it needs to be recharged
An air conditioner blows out heat
Your condenser fan is likely bad. This just happened with my 2003 Dodge Ram. The a/c would run nice & cold as long as I was moving, but once I stopped the a/c would just blow hot air. We replaced the fan and it is as good as new! Good luck!
why does ac blow warm air? why does ac blow warm air?
a cold air mass
No, not if it's on a heat setting. Most home thermostats have a "Fan" setting that will blow cold air if the attic is cold.