The heater is set on recirculate the air of the cabin. Set it on normal (from outside the car)
You have to move a button on the console to take air from outside the car or else the air will be too moist from all the humidity that accumulates in the cabin.
Also the engine temperature must be hot enough. I usually run my car at least 5 minutes driving it downtown before it is hot, during cold winter days.
what would cause all power windows to only work once in awhile and defroster to go out on a 1997 dodge intrepid
The most likely reason would be because you also have the defroster turned on with your heater. The defroster causes the A/C compressor to kick on which helps remove extra moisture in the air keeping your windows from fogging. The A/C compressor is linked to a "kick up" that brings the RPMs up to keep your engine from stalling due to the extra load possibly causing a surge.
On the passengers side floor board or if the heater core just has a small crack then it will fog up the windshield when the defroster is turned on and smell very bad......
Most common things are Thermostat or a bad heater core but could also be something blocking the door down by the heater core. I changed my Thermostat and Heater control Valve to find out a pencil fell in the defroster and prevented the door from closing. Hope this helps.
Most likely a film on the inside of a windshield is caused by an engine coolant leak within the heater core.
You didn't mention what vehicle you have but in most vehicles the heater core is located under the dash on the passenger side. The heater core is known to spring a leak and show up on the passengers floor. Turn on the defroster and see if your nose senses the sweet smell of radiator coolant. The inside of the windshield my fog up when the defroster is turned on, this would also indicate a leaky heater core.
Stained Glass Windows are much more of a sight to passers by, when walking past a church would you rather see coloured glass or clear glass? There's your answer.
What causes heat to only come out of the defrost and vent but not the floor of a 1995 S10 Blazer?
The most likely is the vacuum line used to operate the swinging doors to redirect airflow is broken or not in place.
That has happened to me twice. Once on a Chevy Van and most recently on a 1995 Ford F-150. Both times it was the heater core that needed to be replaced.
your car stalled?
Check that the wire on the rear defroster is connected to the defroster. If broken off repair it.