to keep the plant cold
Return air vents.........
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 middle vents only supply air from the ac unit using a separate in dash fan. the floor and defrost vents come only from the heater
Cold air return vents are the ones on the wall
If the air vents of the Chevy trailblazer 2004 are not blowing air, have the fuel pump checked.
The air is off.
The heater may not be on - but the fan still blows air through the vents when they're open !
The blend door actuator may not be working.
the vents work because of the heat which can make the hot air balloon go up
the vents work because of the heat which can make the hot air balloon go up
There are many places where one can find more information about air vents. One can find more information about air vents by visiting popular on the web sources such as Lowe's and Atlanta Supply.
The HTR RR switch in a Kia Sedona determines which air vents the air is blown through from the rear heating. When it is pushed in, the lower vents blow hot air, and when it is not pushed, the roof vents blow cold air.