Usually it's the evaporator (in dash) that can get plugged from not changing you cabin air filter if so equipped or by other crud floating around in the vent system. Might alos be the blend door or blower motor ploblem. I've even found mouse nests in ducting that's plugged the system.
First of all, the component you mean is called the evaporator, the a.c's equivalent to the heat's heater core . Very unlikely it would or could become that clogged , mouse nest maybe, but even then your blower motor would still push a flow of air., though reduced. what is your vehicle's problem? If you can hear your blower motor running at selected speeds and nothing comes out,the fan or"squirrel cage" may have come off (rare) or the duct work is not operating correctly (kinda rare).
Routine air vent cleaning saves homeowners money by improving the flow of air through the vent. When vents get clogged, the air has a harder time pushing through the vents, which causes energy bills to rise.
Faulty blend door control, clogged cab filter, weak HVAC blower, obstruction in the HVAC ducts.
Airspeed, altimeter, and vertical speed indicator
Airspeed, altimeter, and vertical speed.
Check for the drain hose or pipe in your unit so that it is not clogged. Through the ac process water is collected and thus needs to come out. If the drain is clogged water will be trapped and the blower will pick it up and send it through the vents.
probally closed or clogged
i had the same problem the fix was a squirels nest was built in it and it clogged it up.
Check the cabin filter if applicable.
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Heat and condensation
The heater may not be on - but the fan still blows air through the vents when they're open !
You can clean the air conditioning by vacuuming out the air conditioning vents. You can also clean the air conditioning condenser vent screen.