they are broken. there is usually a little pipe where the air goes throughso tha could be dissconected too.
I'm not sure what vents you are talking about, but usually air vents are known to be working if there is air flowing through them.
The air is off.
To improve airflow in your home using floor vents with fans, place the fans near the floor vents to help circulate air more effectively throughout the room. This can help distribute cool or warm air more evenly and improve overall air circulation in your home.
Dust coming out of air vents is usually caused by a buildup of dust and debris in the air ducts. When the HVAC system is turned on, the air pushes the dust out through the vents. Regular cleaning and maintenance of the air ducts can help prevent this issue.
Vacuum hose that runs over the thermostat housing is leaking at that location.
Jammed blend door or blockage in the ducts if you mean to say air isn't blowing through at all.
vacuum leak?
The air should be comming out of the defroster vents. If so, most likely, it is the vacuum line that controls the vents. It is on top of the engine below the air cleaner, and runs to the front right of the engine. Buy the replacment so you know what your are looking for.
The different types of wall vents available for improving air circulation in a room include gravity vents, powered vents, and combination vents. Gravity vents rely on natural airflow, powered vents use fans to enhance air movement, and combination vents offer both options for better ventilation.
replace? why not fix it?
There may be something blocking the deflectors from sending air up there.
How do you know it is charged properly? If you did not put gauges on the system? If no air is coming thru the vents the coil may be clogged. This list could take a long time!!