Having problems with your 2000 Chevrolet Astro ?

A/c coming out lower vents only

\015 Bad fuse given as solution which fuse?\015 Posted / edited by AnonymousUser on : 15-01-2018

Answers :

Damper is vacuum controlled. Check for broken vacuum line running from manifold to heater control box.
Repair Help & Product Troubleshooting for 2000 Chevrolet Astro

Tips for a great answer:

- Provide details, support with references or personal experience .
- If you need clarification, ask it in the comment box .
- It's 100% free, no registration required.

Suggested Questions/Answers :

We have a 2002 Ford 150. Since we got our 4x4 fixed at the repair shop, we do not have AC coming through the vents. The AC comes out of the defrost and lower vents. If we put the digital climate control on vent then we have air coming through the vent. We changed out the climate control with a different one and noticed one of the vacuum lines missing. Is this suppose to be this way? How can we find a diagram to see why the AC is not coming through the vents?

The vents are operated by vacuum. if you are short a vacuum line that would be the problem. ... Ford Cars & Trucks

1986 Mercedes 300e The air conditioner vents blow cold out of the center two and hot out of the two sides and the defroster vent. I tried to press the lower vents button and the high setting on the climate control panel but hot still comes out the two side vents and when I slow the car down at a red light the vents shut off altogether then come back on when I speed up again. Is there a hot air vent door that is sticking open under the dash somewhere?Is there a common problem with vacuum leaks

All the blend doors and vents are controlled by vauum. If you look in the rear firewall behind the brake master cylinder you will see a vacuum check valve with lines entering the cabin of the vehicle. The yellow colored ones are for your central lock ... 1994 Mercedes-Benz E-Class

There's no air coming out from front vents. Air only comes out of defrost vents or lower vents.

The vacumn feed pipes are perished ,remove the interior engine cover to gain access and their are three pipes being fed from the manifold take off and they are all different sizes ,but its easy to do ... 2000 GMC Safari

Climate control I have a 2003 grand marquis LS when you turn the a/c the comes out of the defroster and lower vents at the same time. I noticed if you are the freeway for time it will blow out of the front vents but if you are on the street and making lots of stops or going over holes or bumps it will change back to the defroster and lower vents again

The ac system on those vehicles are vacuum operated so they can change with acceleration. however it sounds like the head unit on your may be allowing for vacuum to bleed off. ... 2003 Mercury Grand Marquis

My 2004 mitsubshi galant has heat from lower vents (floor) and windshield vents, but not from the dash vents. Nothing (heat nor a/c) comes out of upper vents just above the radio and near the doors. Replaced (used) ac/heater control unit..no luck. This car had a clicking noise in the vents whenever I turned the vent control knob to direct the air through the different vents...it was under warranty, but wasn't doing it all the time, so no luck there.

Sounds like a bad actuator on the dampner. Look for things connected to the ducting, see if you can manually open and close the dampner. ... Mitsubishi Galant

AC will not come out the dash vents all the time. Can lower the fan speed really low and they will sometimes switch back to the dash. All air is coming out the defrost vent.

My ac vent only comes out of the defroster and the floor i replaced the vent door accuator but that didnt work what could be the problem 2004 gand marquise ... 2004 Mercury Grand Marquis

2003 silverado, my selector for the vents (defrost, upper vent, upper vent and lower vents, ect.) When I select upper and upper/lower it clicks and will not allow air to come out of the vents. Need you help in fixing this problem

... 2003 Chevrolet Silverado 1500

A/C will not always come out dash vents, clicks, clunks, tries, then blows air out lower vents and defrost vents on door

Sounds like vacuum solenoid Divertor control or Vacuum leaks. ... 2002 Cadillac Sts

2003 GMC Safari, air not coming from front vents, only defroster and lower vents

... 2003 GMC Safari

Heat only coming to drivers side and nothing on lower vents of s40 2005

... 2005 Volvo S40

The dash vents in my Chrysler new yorker do not blow air - when i turn air or heat on lower and defrosters work fine but no air comes out of the vents on the dah boards

Check the vacuum lines. plastic lines break. one line goes into the fire wall. then there are several lines coming from the control panel. sometimes the plug comes loose ... 1986 Chrysler New Yorker

AC only comes out of defrost vents and lower vents

I had the same problem and mine was a small plastic tube on the right side of the engine, just a little back of the intake manifold. It had collapsed from the heat coming off the engine. I shortened the tube and have not had any problems since. (m ... 1997 Dodge Ram 2500 Club Cab

I have a 1990 Jaguar XJS v12 with a lack of heat. In either auto or man mode, the upper vents blow only cool/cold air even thought the thermostat is set to 80 or 85. There is warm/hot air coming from the lower vents in the foot wells, but only cold up above even with the air/face slider all the way to the red up arrow, and thoughts. The a/c works fine and cools even freezes one when it is acivated by setting the thermostat to 60 or 65.


I have a 2005 Chevy Silverado Z71, and I had to disconnect my battery for some work. When I connected everything back in, the A/C only comes out of the defrost or lower vents...not the upper vents. This happened before, but it started working again on its own.

Your unit has a self learning computer and has to relearn how to shift and how to adjust timing and fuel mixture and with ac on and with it off, give it a week before you start worrying about it. and you will probley not mee ... Chevrolet Silverado 1500

My 1997 buick century is showing that it is overheating on the guage and i lose heat at vents, coolant comes out of the overflow on resivouir. if i turn the heat off the temp comes down to just below the redline on the temp gauge. i have replaced the thermostat, radiator cap, upper and lower hoses, and the coolant temp gauge sending unit.

Sounds like the water pump needs to be replaced. ... Buick Century

Heat comes from vents no matter what setting the lower lever is at

... 1993 Ford Crown Victoria

94 toyota land cruiser leaks water onto rear seat belt drums (mostly on the passenger but some also on the rear drivers side whenever it rains. The sun roof drain vents are working properly and when i poor water in the sun roof drains it comes out behind each of the vehicles drains behind all four wheels. I ran a thin wire through the small drains on the rear sliding side windows and they are clean and seem to drain out of the area around the lower portion of the sliding rear window gasket th

... Toyota Cars & Trucks

My 1999 Jeep cherokee sport is blowing warm air when set on lower floor setting but is NOT HOT ENOUGH on really cold days. I actually feel what feels like cool air coming thru too so my feet & legs are freezing by the time I get somewhere. However, when I set it to vents up high (at face level), it blows out much warmer air (so it seems) but again, NOT HOT either but makes it seem more comfortable but then my feet/legs are freezing! Defrost seems to be working fine and is adequate enough to hand

Hi, my name is John I will do my best to assist you.\015\012 \015\012Based on your description here are my thoughts.\015\012 \015\012\015\012Even if your existing thermostat is good, installin ... 2000 Jeep Grand Cherokee

Ford Ranger 87 2.9 XLT Heater not blowing Hot air. All vents are blowing out air, defrost, lower and middle. Flapper is closing from AC to Heat. I do not think that the heater coil is getting hot . One side of tube coming out of fire wall is hot the other is cold. How do you know which one is to go to what side?

... 1987 Ford Ranger

A/c coming out lower vents only

Damper is vacuum controlled. Check for broken vacuum line running from manifold to heater control box. ... 2000 Chevrolet Astro

The air conditioning does not always work. The air comes out of the defrost or lower heater and not out of the vent.

Look for broken or cracked vac hoses. System designed to FAIL in the defrose mode.. ... 1996 Ford Windstar

I turned ac on yesterday and the CFM coming out of the vents seems lower than normal. The air is just as cold but is not blowing out as hard as it did.

You may have a clogged cabin air filter. check your owners manual on how to service. ... 2006 Dodge Ram 2500

I have a 2002 Chevrolet caprice sedan made in Australia. i am having problem with my car AC. after running for about half an hour the ac performance lowers with very less air flowing through the vents. when i opened the bayonet to check i found that the pipe coming out from the compressor entering into the car cabin duct was freezed with ice formed onto it.i would like to know the exact solution to fix this problem. i live in saudi arabia. Thanks & Regards Noor

It is possible that the pressure cut off switch is not working and so is making the compressor work continuously till the cooling pipes are frozen which eventually is reducing the cooling of the system.\012hence have the cut off checked ... 2002 Chevrolet Impala

I recently purchased a BMW 2003 325I. when I run the airconditioner I have a steady stream of hot air coming from the lower vent onto my feet. This is very uncomfortable especially when wearing sandels. Any thoughts on how to fix??

I have 1994 lexux LS400 how can I uncolck the radio? ... 2003 BMW 325


There will be a block in the piping system in your car try using some radflush to de block the system hope this helps ... 2001 Chrysler Voyager
  • Start your question with What, Why, How, When, etc. and end with a "?"
  • Be clear and specific
  • Use proper spelling and grammar
all rights reserved to the respective owners || www.carrestorationshop.com || Terms of Use || Contact || Privacy Policy
Load time: 1.2163 seconds