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Is it the climate control, blend actuator(s) or both?

 
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Henry
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PostPosted: Mon Jan 16, 2012 11:51 am    Post subject:  Is it the climate control, blend actuator(s) or both? Reply with quote

Did a lot of reading and come up with more quesitons than answers.

02 base Impala

Great heat, just can't control it.

Defroster is always on.
Heat from drivers i/p panel vents
Cool, not cold, from passenger i/p vents
Floor mostly cold on both sides.
Fan speeds work fine.

When the fan speeds are on high, it sounds that there's a lot of air trapped in the dash but not getting out.

The mode control doesn't seem to have any detents. It's hard to tell what mode you're really in. Do these things have detents?

So I'm thinking the climate control/fan speed control might be kaput. yes/no?

I'd hate to have to give this to the dealer. tnx.

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grimsin
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PostPosted: Mon Jan 16, 2012 4:17 pm    Post subject:   Reply with quote

I had the saem problem but passeanger side had control of hot and cold, but driver side was just cold... when it hit winter driver side blew so cold passenger side felt cold also.

It was my driver side blend door actuator motor. you have the same issue except for the passenger side.

my thread : http://www.naioa.com/v2/module.....mp;t=45489
good luck.

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Henry
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PostPosted: Tue Jan 17, 2012 1:00 pm    Post subject:   Reply with quote

I figured one of the issues was probably a blend door. tnx.

Does anyone know why the floor vents would still blow cold air?

And does the outlet control (on the right side of the heater control panel) have detents, or is it a smooth rotary knob?

tnx.

One answer down, two to go.

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grimsin
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PostPosted: Wed Jan 18, 2012 9:59 am    Post subject:   Reply with quote

have you replaced the actuator motor yet? most likely why your getting cold threw the floor vents.

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Henry
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PostPosted: Wed Jan 18, 2012 11:02 am    Post subject:   Reply with quote

No, but I ordered one (Amazon $28 w/free ship). When it arrives I'll let you know.

But can you do me a favor? Will you turn the mode knob on your heating control and tell me if you can feel detents? Does your knob snap into a position or does it rotate with no real sense of what position you're in? Mine rotates smoothly and other than feeling the air coming from the ducts (which is unreliable at the moment due to apparent actuator failures) you can't tell what mode you're in. This is especially bad when driving. As I have to look at the control to tell where I am.

Tnx.

oops. I see you have a 2005. Maybe yours is different. But can you check anyway?

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billy101
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PostPosted: Wed Jan 18, 2012 11:49 am    Post subject:   Reply with quote

The blend doors are vacuum controlled hense why there is no "mechanical" stop feeling between each setting I believe.

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PostPosted: Wed Jan 18, 2012 11:19 pm    Post subject:   Reply with quote

Yes, there are detents on the mode selection knob... more so on the 00-03 because it is a mechanical switch where the 04-05 is an electronic control

BBEngineer

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grimsin
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PostPosted: Wed Jan 18, 2012 11:48 pm    Post subject:   Reply with quote

i dont have to look while im drivng to make sure it 100% on the lets say the floor positio, i can feel the knob go into a "groove" for each setting,

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Henry
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PostPosted: Thu Jan 19, 2012 1:09 pm    Post subject:   Reply with quote

Thanks for the replies, guys. I might have to replace the heater control also. But first I'll do the actuator when it arrives in about 5 days. I took the super slow (but free) shipping option.

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Henry
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PostPosted: Tue Jan 31, 2012 7:08 pm    Post subject:   Reply with quote

Well here we are. I changed the actuator and that wasn't it. I guess the original is now a spare part.

The heater control that I ordered came in yesterday, so hopefully I can put it in over the weekend. Thankfully, it's currently summer in NJ even though the calendar says it's winter, so lack of heat isn't too painful.

I do have voltage at the brown wire and the black ground wire is good too. So the signal must not be coming down the wht/blk wire. Does anyone know if it is supposed to be a voltage or a resistance on that wire?

Updates when they happen.

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Henry
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PostPosted: Mon Feb 06, 2012 10:50 am    Post subject:   Reply with quote

So in the end, it wasn't the actuator but the heater control panel.

One of the sliders wasn't working for some reason. Time to open it up an find out why.

If you find yourself in this position...... there are three wires in the harness.

To make this harder (while you're twisted under the dash and reaching for the slider)
the manual states that the harness should be plugged into the actuator while you are testing it.
I also read (on the replacement actuator sheet) to not test the actuator unless it is in the installed position.
Something about the actuator going pass the travel limit and mucking it up.
Don't know it that's true. But I wasn't taking chances.

Black - ground.
Brown - power. You should see battery voltage with the key on and the engine off.
On the right side, the signal wire is white with a black stripe (at least it looked like that to me).
Connect a voltmeter across the black wire and this wire.
Move the slider. The voltage (if present) should change with the slider.
I had no voltage at all.

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