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New Actuator...Not Fixed

New Actuator...Not Fixed

Postby MsMandy [OP] » Feb 19 2018, 7:25pm

My old actuator blew cold air if the temperature with set all the way to cold, but one click and you were at full heat. I replaced the actuator and now it blows likewarm on all settings. The blend door knob moves freely by hand. I have tried to reset the actuator with the disconnect the battery and it run for a few minutes trick. I have also tried a second new actuator. Neither worked. Please help!
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Re: New Actuator...Not Fixed

Postby Macrisel » Feb 21 2018, 4:21pm

I know this doesn't help you right now, but I am experiencing the same problem. I just replaced my driver's side actuator and my temp control will still not work. Not sure if the replacement part is bad or if something else is going on. I can move my blend door by hand, but no movement from the new motor. I have also tried the relearn procedure several times with no luck.

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Always in the middle of a project.....
My current garage
2008 Sierra 1500 Reg Cab SWB Z71
2007 Chevy 2500HD Classic Quad Cab 4x4
2011 Chevy Tahoe
2006 Pontiac G6
1980 Chevy Malibu, 400 sbc, far from stock
1959 Chevy Biscayne, mostly stock
1951 Willys Overland CJ 3A, frame off restoration
Macrisel
Firing on 1 cylinder [L1]
Firing on 1 cylinder [L1]
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Re: New Actuator...Not Fixed

Postby Macrisel » Feb 27 2018, 5:03pm

I have tried another actuator thinking my replacement part was bad. Still no luck. Does anyone have a test procedure for the testing the actuator plug? Also, could this be an issue with the actual HVAC control unit in the dash?

Need some help, I'm out of ideas!
Always in the middle of a project.....
My current garage
2008 Sierra 1500 Reg Cab SWB Z71
2007 Chevy 2500HD Classic Quad Cab 4x4
2011 Chevy Tahoe
2006 Pontiac G6
1980 Chevy Malibu, 400 sbc, far from stock
1959 Chevy Biscayne, mostly stock
1951 Willys Overland CJ 3A, frame off restoration
Macrisel
Firing on 1 cylinder [L1]
Firing on 1 cylinder [L1]
Posts: 19
Topics: 3
Joined: Dec 15 2015, 6:11pm
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: Missouri
Year: 2007
Make/Model: Chevrolet Silverado
Extra Info: HD 2500
Group Membership:
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Re: New Actuator...Not Fixed

Postby nealinator » Feb 27 2018, 7:19pm

I am a little confused with two of you stating you have moved a blend door actuator by hand? How are you doing that? Mine are super stiff and feels like you would break the actuator if you move it...or are you talking about after removing the actuator and then being able to check if the door moves freely?

I purchased some non-OEM parts for mine..and they worked for a bit...then seemed to get flakey. I returned those and bought some OEM quality ones and have not had any issues since. Can't say that is your issue. Be sure to check that your heater core is not blocked (sounds like it was blowing hot before) and the hvac system is properly charged with freon.

Are you mode doors properly working and moving air to the different vents-floor-defrost?
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Re: New Actuator...Not Fixed

Postby MsMandy [OP] » Feb 27 2018, 9:57pm

I am referring to moving the blend door after the actuator has been removed. Mode doors are working correctly. In my case, it seems cool air (vent or AC) is being limited by the old and new actuators.
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Re: New Actuator...Not Fixed

Postby nealinator » Feb 27 2018, 10:15pm

Have you tried running it with the actuator removed to see if you can get the full temp swings hot to cold by moving it manually?

What parts did you buy(actuators) and from where?
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Nealinator's 5.3L 4x4 Z71 All Terrain192,029 miles
AMP Power Steps - Retrax Pro Cover - Terra Grappler G2 - Airaid MIT - Mobil 1
Borla Exhaust - Eonon GA7180 - Custom Catch Can - Bilstein 5100's - $ Cost $ - DiabLew Tune
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Re: New Actuator...Not Fixed

Postby Macrisel » Feb 27 2018, 11:20pm

Same thing for me....I can remove my actuator and move the blend door by hand to change from hot to cold. Both my heat and my a/c appear to be functioning normally, I just can't use the driver's side temp control to change the temperature. I removed the HVAC control last night and unplugged both plugs from the rear of it, but it did not solve anything.

I am down to thinking the issue may be in the HVAC unit itself or some other relay buried somewhere. However, I am hesitant to drop $150 for a replacement HVAC control unit if that is not the issue...

Here is the actuator I purchased:
https://www.amazon.com/gp/product/B0741 ... UTF8&psc=1

Since I thought the first one was defective, I contacted the company and they sent me an additional one to replace it. The second one also did not fix my issue. I am not unsure of whether my OEM original actuator was broken..

BTW, my truck is a 2007 Chevy 2500 classic..
Always in the middle of a project.....
My current garage
2008 Sierra 1500 Reg Cab SWB Z71
2007 Chevy 2500HD Classic Quad Cab 4x4
2011 Chevy Tahoe
2006 Pontiac G6
1980 Chevy Malibu, 400 sbc, far from stock
1959 Chevy Biscayne, mostly stock
1951 Willys Overland CJ 3A, frame off restoration
Macrisel
Firing on 1 cylinder [L1]
Firing on 1 cylinder [L1]
Posts: 19
Topics: 3
Joined: Dec 15 2015, 6:11pm
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: Missouri
Year: 2007
Make/Model: Chevrolet Silverado
Extra Info: HD 2500
Group Membership:
Registered users

Re: New Actuator...Not Fixed

Postby nealinator » Feb 28 2018, 1:25am

If you plug it in without the actuator bolted up....can you see it moving?

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Nealinator's 5.3L 4x4 Z71 All Terrain192,029 miles
AMP Power Steps - Retrax Pro Cover - Terra Grappler G2 - Airaid MIT - Mobil 1
Borla Exhaust - Eonon GA7180 - Custom Catch Can - Bilstein 5100's - $ Cost $ - DiabLew Tune
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nealinator
Shifting into Sixth Gear! [L3]
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Re: New Actuator...Not Fixed

Postby Macrisel » Feb 28 2018, 4:13pm

No, the actuator does not move when plugged in but not bolted up. That is why I suspect the HVAC control unit or some hidden relay I am unaware of.
Always in the middle of a project.....
My current garage
2008 Sierra 1500 Reg Cab SWB Z71
2007 Chevy 2500HD Classic Quad Cab 4x4
2011 Chevy Tahoe
2006 Pontiac G6
1980 Chevy Malibu, 400 sbc, far from stock
1959 Chevy Biscayne, mostly stock
1951 Willys Overland CJ 3A, frame off restoration
Macrisel
Firing on 1 cylinder [L1]
Firing on 1 cylinder [L1]
Posts: 19
Topics: 3
Joined: Dec 15 2015, 6:11pm
Years of membership: 5 years of membership5 years of membership5 years of membership5 years of membership5 years of membership
Location: Missouri
Year: 2007
Make/Model: Chevrolet Silverado
Extra Info: HD 2500
Group Membership:
Registered users

Re: New Actuator...Not Fixed

Postby nealinator » Feb 28 2018, 4:33pm

Got you. Not sure how to test that really...Should see some voltage coming though the pins...but which one...etc....don't know.
Image
Nealinator's 5.3L 4x4 Z71 All Terrain192,029 miles
AMP Power Steps - Retrax Pro Cover - Terra Grappler G2 - Airaid MIT - Mobil 1
Borla Exhaust - Eonon GA7180 - Custom Catch Can - Bilstein 5100's - $ Cost $ - DiabLew Tune
User avatar
nealinator
Shifting into Sixth Gear! [L3]
Shifting into Sixth Gear! [L3]
Posts: 15802
Topics: 170
Images: 30
Joined: Mar 02 2015, 2:35pm
Years of membership: 6 years of membership6 years of membership6 years of membership6 years of membership6 years of membership6 years of membership
Location: Katy, TX
Year: 2010
Make/Model: GMC Sierra
Variant: All Terrain
Extra Info: 1500 5.3L 4x4 Z71
Group Membership:
How-to Authors
TOTM Winner
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