Unscrew the air duct covers or grilles from the walls.
Vacuum air conditioner vents.
Then go to the thermostat and turn on the fan only and let the vacuum run for a few minutes.
Dryer vent cleaner kit vacuum attachment and dryer vent brush.
If they re very dusty and grimy you may want to use soap and water to make them gleam.
After about ten minutes turn your a c off open all the car doors and let the fan blow for another five minutes.
Use your brush to clean the grates thoroughly.
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When done put a fresh filter in.
Consider renting a heavy duty vacuum for this.
Unscrew air conditioner vent grilles and give them a good thorough cleaning using warm soapy water and a soft bristled brush.
Set both the air conditioner and fan blower to max.
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This dryer lint brush vent trap cleaner tool makes cleaning your lint trap and dryer vent a breeze.
Let the grilles dry completely.
Vacuum the ducts as much as possible.
Start the engine and set the air conditioner to max.
I only do this for the vents where the air blows out.
That does a great job and you can do it with or without the brush.
After you ve sprayed all of your vents start your car s engine.
Use a high powered vacuum my tool of choice is a shop vac to vacuum just inside the ducts removing any dust or debris.
Turn off the power connected to the heating and air conditioning system.
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