Question about 1999 Chevrolet Silverado 1500
When car air conditioning barely blows out air from a/c vents, usually the problem is the blower, its either failing blower or sliding blower wheel from the blower motor shaft, another reason is that blower might be suffering from a faulty dashboard blower switch assembly, making the blower not operate on maximum operation even if it was set on the highest setting.
Air duct blockage also restrict the flow of air from coming out the vent, because of a closed or nearly closed air doors that is stuck inside from one of a/c duct, this prevent the air to come out the vent, also it is possible that an accumulation of debris such as leaves from a fresh air intakes prevents the flow of air, but the restriction of air can only be felt when your car air conditioning is set to "fresh".
Posted on Aug 11, 2010
Replace the cabin air filters
Posted on Aug 04, 2010
Testimonial: "yes! thank you I looked around other places online and this was the easiest answer so I tried it first and my air is blowing harder now! :)"
Did you check the other vent for air flow (defroster & foot) if it is the same when switching the knob, remove the fan motor located on the right side under the dash, put your hand in the hole and scrap the heater core with your finger nails, I ran into this problem, using stop leak will leak out of the heater core and collect dirt, I sparyed brake cleaner on the heater core without removing it, when the air flows it will smell like brake cleaner, so no flames or cigs. open the doors to air out, takes about 5 min.
If it does blow good thru the other vent then you have a actuator not closing the vent door.
Posted on Aug 04, 2010
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Posted on Jan 02, 2017
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