blend door control
Thread Starter
Racer
Joined: May 2012
Posts: 269
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blend door control
on passenger side agianst the kick panel there is a vacumn control. is this the blend door control? it does not move no matter where the control switches are. it is in the up position, i am not getting any heat. there is a screw there, if i disconnect it will i get heat? don`t say get a FSM, i can`t afford one.
Race Director
Joined: Apr 2002
Posts: 10,036
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From: Anaheim CA
That's the door that controls whether the air in the cabin is recirculated or brought in from outside.
On a C68 (electronic) HVAC system it only recirculates in the AUTO mode.
On C60 (manual) HVAC systems it recirculates in the MAX mode.
On a C68 (electronic) HVAC system it only recirculates in the AUTO mode.
On C60 (manual) HVAC systems it recirculates in the MAX mode.
Thread Starter
Racer
Joined: May 2012
Posts: 269
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any idea how i can get to blend door itself? it doesn`t move no matter what position i put it, its manual
Last edited by tntwolt; Dec 19, 2013 at 02:06 PM.
Safety Car
Joined: Oct 2004
Posts: 3,830
Likes: 3
From: Granada Hills CA
Here is an old thread that shows some info and diagrams.
http://forums.corvetteforum.com/c4-t...oval-help.html
http://forums.corvetteforum.com/c4-t...oval-help.html
Race Director
Joined: Apr 2002
Posts: 10,036
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From: Anaheim CA
They completely redid the HVAC electronics in 1990. I don't know anything about it, except that they moved all the functionality from the HVAC control head to the HVAC programmer. Side note: I just found out that the FSM calls it the ECC -- Electronic Climate Control.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The blend door is inside the evaporator housing on the firewall in the engine compartment. You can see it by removing the blower motor resistors.
.
Last edited by Cliff Harris; Dec 20, 2013 at 03:17 AM.
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Thread Starter
Racer
Joined: May 2012
Posts: 269
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The blend door cable goes to an L-shaped lever (#5) on the heater housing that controls the position of the blend door (#15) through a rod (#13):
The blend door is inside the evaporator housing on the firewall in the engine compartment. You can see it by removing the blower motor resistors.
.
The blend door is inside the evaporator housing on the firewall in the engine compartment. You can see it by removing the blower motor resistors.
.
Race Director
Joined: Apr 2002
Posts: 10,036
Likes: 346
From: Anaheim CA
The blend door lever and cable is located on the heater core housing. It's easiest to get to it by taking off the passenger side kick panel (several 7mm screws).
I have seen a photograph somewhere but I couldn't find it to post to this thread.
I have seen a photograph somewhere but I couldn't find it to post to this thread.