Of course the customer brought the truck in, knowing that I had to lay under the driver’s … Continue reading "2005 GMC Sierra, Air Blows Only From Defroster Vents" Any one know what I need to do to fix this problem? Why Do My Vents Blow Only Hot or Cold Air? Restart the truck, it returns to normal. Step 2 – Check the air conditioning system. so the heater never gets hot. Average failure mileage is 68,550 miles. I am not getting any air at all from the front vents but all other vents are blowing air just fine & strong (floor, defrost, combo, etc). Air not coming out of vents Unread post by Seabreeze98 » Fri Jun 13, 2014 3:23 am I have a 1999 Silverado 1500 .When you turn on the blower for the AC or the heater you can hear the blower running but no air comes out of the vents. The 2006 Chevrolet Silverado has 3 problems reported for smoke coming out of vents while ac on with plastic smell. Get to work shut off truck, wait a few minutes and restart and now I'm back to getting cool air out of the vents. Make sure this is getting vacuum. Controls on the center console allow the driver and their passengers to control the type and flow of air, along with its direction. no air coming out the dashboard or defrost vents. Read this article to find out why. Easy to use parts catalog. This is not even a question for the 4.3 section. i believe that one or more actuator motors need replacing. The last thing i can try is getting a new blower motor resistor. This 2005 GMC Sierra came in with the complaint that the air will only flow from the defroster vents, regardless of where it is commanded to. Blower motor working, but no air from vents? This is a 2005 Chevy Silverado 1500 wt with a 4.3L V6. ! thanks 2005 Chevrolet Silverado 1500 / Why is there no air coming... Why is there no air coming from vents? Chevrolet silverado 1500 5.3 V8 4x4: Initially the defroster only worked and the air also came thru the vents to the rear seats. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. July 03, 2011. My car has an automatic transmission. Before replacing Heater Control Unit, it would only blow hot air from front vents- With this replacement it will now change from cold to hot and the air flow pressure does change from the front vents when changing the setting dial but there is still no air at all to feet and defrost. Refrigerant, commonly referred to as freon, is a chemical that, when fluctuating through high and low pressures, becomes cold. Even if i turn the fan up to full and set the air to come out of the upper vents, I can just barely feel any air coming out of them. I can hear the motor running and changing speeds, but only once in a while it will actually blow the air through the vents. They get a lot of use, and they can get a considerable amount of grime built up on them, making them look gross and nasty. Work on a 95 Chevy Silverado 3500 1 ton short wheel base 454TBI. In most cars, the vents can pipe in neutral air, heated air, or air-conditioned air. Step 1 - Most air control vents are equipped with a flow control door that is located at the vent outlet. user91328 on . I love the truck EXCEPT for this split heating problem. A vehicle’s ventilation system is responsible for pushing air into the cabin of the car. July 02, 2011. pukin01 in Buena Park, CA on . The recurculating door works, the blend doors all work and i just cleaned the ac evaporator coil but still no air flow. No one here is going to be able to give a clear cut answer because only you have the truck in front of you. Some of this coolant is diverted from the cooling system into a heater core. The Mode Selector Actuator. it appears that the doors are working. Defrost is a default position. SOURCE: There is no air flow You need part GM Part number 89018675 or ACDelco 15-73596. 94 chevy truck no air out vents. The blower motor is working. This morning I noticed that basically no air is coming from any of my vents even though the blower motor is running fine. Six bolt has no park/neutral switch/454TBI. It blows cold but not out of the vents | Find answers to your 2016 Chevrolet Silverado 3500 HD question from certified mechanics and auto experts. The flap to the right in the picture operates the dashboard vents. Check gauges not overheating or anything else out of the norm. The flap to the left in the picture, which would be towards the front of the truck, goes to the defrost vents. I have already checked and fixed what i thought was the main problems. I have a 1999 chevy tahoe with front and rear A/C. Air only blows from center vents. 06 2wd conversion, stock. ... My 2000 silverado has a vacuum switch in the heater control. Sep 22, 2013 at 2:01 PM #1. 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