Confused - Blend Door Actuator or Temperature Actuator
#1
Confused - Blend Door Actuator or Temperature Actuator
Vehicle - 1998 Blazer LS 4WD, manual temp/AC controls
Symptom - Heater blows or trickles hot air all the time, even when turned to the off position. Will not blow a/c cold, though a/c tests good. Hot air will blow where it is supposed to i.e. - defrost vents, floor or dash.
I have read a few threads here and elsewhere, such as:
https://blazerforum.com/forum/tech-articles-diy-29/how-2nd-gen-blend-door-actuator-replacement-29981/ and
http://www.automotiveforums.com/vbul...d.php?t=574779 .
If it is the temperature actuator, can anyone confirm this is replaced through the "center control panel" where the switches are located as indicated in the first thread listed? I couldn't quite tell. In addition, what is the part number and a purchasing source for the part.
If it is the blend door, while I dropped the glove box, I still couldn't locate the part. I will post pictures if this is the issue.
Great forum, total newbie, shade tree mechanic. Thanks for being here for us "idiots"!
Mark
Symptom - Heater blows or trickles hot air all the time, even when turned to the off position. Will not blow a/c cold, though a/c tests good. Hot air will blow where it is supposed to i.e. - defrost vents, floor or dash.
I have read a few threads here and elsewhere, such as:
https://blazerforum.com/forum/tech-articles-diy-29/how-2nd-gen-blend-door-actuator-replacement-29981/ and
http://www.automotiveforums.com/vbul...d.php?t=574779 .
If it is the temperature actuator, can anyone confirm this is replaced through the "center control panel" where the switches are located as indicated in the first thread listed? I couldn't quite tell. In addition, what is the part number and a purchasing source for the part.
If it is the blend door, while I dropped the glove box, I still couldn't locate the part. I will post pictures if this is the issue.
Great forum, total newbie, shade tree mechanic. Thanks for being here for us "idiots"!
Mark
#2
No, it is definitely not replaced through the center... It is on top of the HVAC ductwork towards the passenger side, accessible by dropping the glove box down.
I have to get this thread updated. The pictures were lost in my last server move for my personal website.
A/C Evap Core Odor - Here's the fix!
I think those pictures show the location of the actuator though.
And never sell yourself short by using such a word!
I have to get this thread updated. The pictures were lost in my last server move for my personal website.
A/C Evap Core Odor - Here's the fix!
I think those pictures show the location of the actuator though.
And never sell yourself short by using such a word!
#3
Still confused
Thank you for the prompt response. Unfortunately the pictures were not available.
Do you think the problem is blend door or temperature actuator?
If blend door, I still don't see how to get to it through the glove box. Here is a photo of what I see and have messed with behind the glove box.
I truly appreciate the forum's expertise and assistance!
Do you think the problem is blend door or temperature actuator?
If blend door, I still don't see how to get to it through the glove box. Here is a photo of what I see and have messed with behind the glove box.
I truly appreciate the forum's expertise and assistance!
#4
It is further up to the right looking at your picture. If I remember correctly, you need a mirror to see it, but there is enough room to get your hands in there and with a small enough bit, you can get the screws out.
The blend door is moved by the temperature actuator.
This schematic will illustrate which door performs each function:
So as you can see, you could either have a problem with a broken blend door, or an improperly calibrated or defective actuator. You could run through the recalibration procedure... I cannot look it up for you right now, but I know it has been posted before.
The blend door is moved by the temperature actuator.
This schematic will illustrate which door performs each function:
So as you can see, you could either have a problem with a broken blend door, or an improperly calibrated or defective actuator. You could run through the recalibration procedure... I cannot look it up for you right now, but I know it has been posted before.
#5
Precisely! The learning curve is a little steep, I'm clinbing it myself right now, but have faith it can be overcome!
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