A/C Problems

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Jul 7, 2010 | 08:23 PM

Tom's '07 Monty

Thread Starter

Racer

Joined: Jun 2009

Posts: 273

Likes: 15

From: Wichita Falls Texas

A/C Problems

I have a 90 Roadster that does not seem to cool properly. It has proper load of freon. In the 90+ degrees in North Texas, it does not cool the car. I can feel cool air (not real cold) coming out of the vents. Also, even though the blower is set at 10, the air flow is not very strong. Any suggestions?

thanks, Tom's '07 Monty

Jul 7, 2010 | 08:24 PM

CorvetteMike2024

Corvette Enthusiast

Joined: Oct 2007

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From: So. Cal.

2025 C7 of the Year Finalist- Unmodified

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Quote:

Originally Posted by Tom's '07 Monty

Check your blend door for proper movement.

Jul 7, 2010 | 08:28 PM

Tom's '07 Monty

Thread Starter

Racer

Joined: Jun 2009

Posts: 273

Likes: 15

From: Wichita Falls Texas

good idea! Had that problem in my '78 - it had a pinched vacuum line to the motor that opened the door (came that way from the factory).

But that does not account for the low blower speed.

thanks

Jul 7, 2010 | 08:39 PM

CorvetteMike2024

Corvette Enthusiast

Joined: Oct 2007

Posts: 6,772

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From: So. Cal.

2025 C7 of the Year Finalist- Unmodified

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Quote:

Originally Posted by Tom's '07 Monty

good idea! Had that problem in my '78 - it had a pinched vacuum line to the motor that opened the door (came that way from the factory).

But that does not account for the low blower speed.

thanks

The blower speed on these C4's is very pathetic at best. Agent 86 knows alot about the HVAC controls. Maybe send him a PM. I think the high speed on the fan may be controlled different than lower blower settings.

The blend door is electronically controlled.

Last edited by CorvetteMike2024; Jul 7, 2010 at 08:43 PM.

Jul 28, 2010 | 06:51 PM

Bubba91

Pro

Joined: Dec 2004

Posts: 674

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From: Daytona Beach Florida

Quote:

Originally Posted by CorvetteMike2004

Check your blend door for proper movement.

How do you check the blend door?
I also have low air flow and I just cleaned my evaporator and condenser. Mine is a 91 with manual controls, r134a and the temp from the vent is only 70 degrees and it has a full charge. thanks

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