Bonneville blower AC climate control problem

[randman1]

Whatcha got in mind?

[19Bonneville94SSE]

Hey guess what I have a new thing to add to this! Randman I hope you are still here because uve been a big ass help. ok like you said before well... asked before if the air was going to a different loacation such as the windshield... well driving home from work today I noticed that when the RPM's went UP the air wend DOWWWNNNN... welll I did it again and again and again and I was laughing my ass off because I figured my car was figuring out a way to make me not speed anymore :-) anyways... I put my hand up to the windshield next time the light turned green and sure enough gradually the air went DOWN on the mid-level and went up to the windshield... I couldnt believe it! Ok so I re-read this thread and you said that it could be because of a broken or disconnected vacuum line... could it be because of the vacuum tank that the lines run to? Oh and ALSO it was only while it was in gear... not in Neutral or park... I dont know if that makes a difference. Let me know what you think! Thanks a lot

[randman1]

The vacuum tank or the line(s) going to/from it are the most common problem area. There should only be one vacuum line that plugs into the tank but there is a T shortly down the line. There's also a check valve which allows the tank to "store" the pressure.

More often than not, people in your situation will find the line going to the tank disconnected or leaking. Your check valve may be in backwards because I think I remember you saying that you changed some lines at some point.

You might want to invest in a vacuum gauge. This can be helpful to pinpoint where the problem lies in the vac system. they're less than $20

[19Bonneville94SSE]

I will most likely get the gauge. It will be a while because our weather here is jumping from 90-50 from rainy to sunny so I dont know when Ill get the chance to do it. I will let you all know the outcome. Thanks for your help Randman!

[19Bonneville94SSE]

Ok nevermind it seems when I changed the vacuum lines two weeks ago I put one that was a little too big and wanst making a secure line so it was leaking... LOL so not im left with the original problem with not enough air coming out of the vents I THINK I AM GOING TO GIVE UP!

[randman1]

So after you replaced the vacuum line, the air flow was decreased?

[19Bonneville94SSE]

no, it was still the same, it didnt really increase when I changed the vacuum line, but the problem with the air flow going to the windshield stopped...

[markwb]

Is the evap core freezing up when a/c is on thereby restricting air flow across evap? Grasping at straws here.

[markwb]

Forget what I posted, I just realized there are two pages here, didn't read the thread all the way through. Sorry, my bad.

[Hennie]

I am having siomilar problems but have not done the evap core cleaning yet, I am having trouble locating it, I have a 92 bonne ssei and I have looked behind the fuse bank under the hood, a location I have read about in this forum, Any hints or pics would be very helpful.

[randman1]

The Blower Control Module under the Maxifuse/relay center under the hood more towards the passenger's side. You can also follow the wire loom from the blower motor right to it. Remove the BCM to inspect the evap core and clean (vacuum) if necessary.

[rmheisey]

I think that I am having a very similar problem with my 94 SSE. It is if the deflector doors get stuck. If you cycle the heat from 60 to 90,shut it off, go from ac to econ, etc. you eventually get the ac to blow some cold air. Same issue now that the weather is cooler, the heat wants to come out of the vents at a lower temperature.
Any ideas here?

[randman1]

Vacuum sources do not control the temp, only the direction of air flow. I'd suspect a failing air mix actuator especially if the temp display blinks on your ECC head. Do a search for "air mix actuator" in this forum. There are many threads that address the problem

[19Bonneville94SSE]

Well for my car all I have to do is turn it off then turn it back on and the air will come out at a better speed, nowhere near what it should be, hell my friend has a 92 Cavilier and the air nearly pushes my head back!!! This a 30 something thousand dollar car and believe me the air sucks!!! Ive tried everything and this board has helped but im starting to think maybe it is my blower motor, it sounds like its a full speed but hell the cars old, 208k!!! Cant complain if shes still runnin

[jdq]

Im having aproblem also with Climate Control and its killing me.I spent 2 days going over vaccuum hoses which i did find a leak by throttle body and fixed.Cleaned out heater core and changed hoses its ok, changed thermostat,cleaned out evap core,fan woks well ,but only coming out of floor or defrost on heat,blowing warmish cool air.When on A/C it will come out of mid vents.Top rad hose is hot,outside air temp seems normal.spent hours on Hvac programmer che cking leaks,(the for resistor looking things in HVAC programmer that have brownish filter on on them 3out of the4 when I cover with finger make a air noise ,dont know if means anything.
1990 bonn sse ,digital climate control,3800

please ,please help I cant take it JDQ and thankyou