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Air flow will not regulate.

Forum: C3 HVAC, Fuel, Emissions, and Exhaust

9 Messages
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Air flow will not regulate.

Posted: 5/25/22 8:14pmMessage 1 of 9
M
Mark Laird
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Milford, DE - USA
Joined: 11/6/2021
Posts: 67
Vette(s): 1977 C3 Auto Coupe Lt Blue/Dk Blue Prev. 1968 C3 convertible 4spd Red 1984 C4 Automatic Silver 2000 C5 Automatic Black

Seems like my fan blower only wants to blow air thru the floor vents. Cannot get it to the upper vents for either Air thru upper middle or defrost. Any ideas? 1977 w A/C

Also I'm missing the lower A/C ducting on Left (Drivers) side. Anyone have a used one they like to sell?

Thanks!

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Re: Air flow will not regulate.

Posted: 5/25/22 10:55pmMessage 2 of 9
7
73shark
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 916
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day. 2023 Accelerate Yellow HTC Stingray

Could be a bad actuator or a leaky/disconnected hose.

1973 L-82 4 spd

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Re: Air flow will not regulate.

Posted: 5/29/22 7:11pmMessage 3 of 9
M
Mark Laird
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Milford, DE - USA
Joined: 11/6/2021
Posts: 67
Vette(s): 1977 C3 Auto Coupe Lt Blue/Dk Blue Prev. 1968 C3 convertible 4spd Red 1984 C4 Automatic Silver 2000 C5 Automatic Black

Would that be the Actuator above the right side kick panel?

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Re: Air flow will not regulate.

Posted: 5/29/22 7:38pmMessage 4 of 9
7
73shark
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Overland Park, KS - USA
Joined: 7/9/2003
Posts: 916
Vette(s): 1973 Orange Metallic Coupe (orig owner), L82, 4 spd (WR), PS, (A/C & PW (I installed from wrecked 73)), leather, AM/FM Stereo, ran with '65 FI unit earlier & will again some day. 2023 Accelerate Yellow HTC Stingray

I think it would be more on the main ductwork under the dash. There's one actuator that controls the flow of air to the different vents.

1973 L-82 4 spd

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Re: Air flow will not regulate.

Posted: 6/2/22 7:04amMessage 5 of 9
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rraider1
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Woodland, WA - USA
Joined: 10/14/2003
Posts: 1171
Vette(s): 1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Does this Help

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Re: Air flow will not regulate.

Posted: 6/2/22 8:25amMessage 6 of 9
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rraider1
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Woodland, WA - USA
Joined: 10/14/2003
Posts: 1171
Vette(s): 1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

Sorry earlier was 77 this is for 74 should still help

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Re: Air flow will not regulate.

Posted: 6/2/22 8:26amMessage 7 of 9
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rraider1
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Woodland, WA - USA
Joined: 10/14/2003
Posts: 1171
Vette(s): 1977 T-Top,350,Auto Black Ruby Pearl,Steeroids R&P conversion

 

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Re: Air flow will not regulate.

Posted: 6/2/22 11:25amMessage 8 of 9
M
Mark Laird
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Milford, DE - USA
Joined: 11/6/2021
Posts: 67
Vette(s): 1977 C3 Auto Coupe Lt Blue/Dk Blue Prev. 1968 C3 convertible 4spd Red 1984 C4 Automatic Silver 2000 C5 Automatic Black

Thats what i have is a 1977

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Re: Air flow will not regulate.

Posted: 6/2/22 11:26amMessage 9 of 9
M
Mark Laird
Free Member
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Milford, DE - USA
Joined: 11/6/2021
Posts: 67
Vette(s): 1977 C3 Auto Coupe Lt Blue/Dk Blue Prev. 1968 C3 convertible 4spd Red 1984 C4 Automatic Silver 2000 C5 Automatic Black

Thanks again, your a life saver!

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