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So my climate control slider is stuck on my '85. It's on heat. I don't necessarily need AC, but I'd like to stop it from venting heat into the cab for now (I'll actually fix it later). Can someone help me accomplish this? Is it an easy job to just close the heater door?
What about this? This valve redirects the coolant from the heater core, right? So if I zip tie it, it will not have the hot coolant running through the heater core, right? Or am I crazy?
This is a temp fix obviously. I need to REALLY fix the climate control soon. It just might be a week or two before I can actually tear apart the dash to actually fix it.
So, from everything I've read, the Heater Control Valve in a 1985 ONLY controls the flow of coolant into the heater core, right? And it's controlled by vacuum? So if I 'fake' the vacuum by holding it closed with a zip tie, I'm not going to break anything, right? Coolant simply won't flow into the heater core?
Just wanting to check before I destroy something...
I cut the inlet hose and spliced in a shutoff ball valve on my car, threw away the vacuum controlled unit because it was 30 years old. Lots of people have been doing this for years on cars that have excessive cabin heat. It cost me $12 from lowes.
Noticeable difference in the summertime when its not closed, cabin roasts the crap out of me. I open it at least once per week to cycle coolant through the core.
I cut the inlet hose and spliced in a shutoff ball valve on my car, threw away the vacuum controlled unit because it was 30 years old. Lots of people have been doing this for years on cars that have excessive cabin heat. It cost me $12 from lowes.
Noticeable difference in the summertime when its not closed, cabin roasts the crap out of me. I open it at least once per week to cycle coolant through the core.
I might do this as well, sounds like a common mod. Have a good write up of it someplace?
Thanks for the replies guys (and Viking for replying for me, lol).
My manual AC slider is completely stuck. I'm going to have to take stuff apart to figure out where the hold up is. I'm guessing either the cable is shot or the heater door is stuck open. At least I know my heat works! Lol. I'm guessing(hoping) the AC will work once I get the slider unstuck.
I haven't worked on the Vette, but based on other cars I have the thing you're interested in is coolant flow through the heater core, not the door. The door typically would open for things like heat and vent and close for a/c IIRC. Shut off coolant flow through the core and you should not have any heat entering typically but would have air flow.
Admittedly I haven't worked on a Vette for this, but I have on some Chevelle's, Cutlas' and Torino's with manual controls and that's basically how they worked.
I might do this as well, sounds like a common mod. Have a good write up of it someplace?
Thanks for the replies guys (and Viking for replying for me, lol).
My manual AC slider is completely stuck. I'm going to have to take stuff apart to figure out where the hold up is. I'm guessing either the cable is shot or the heater door is stuck open. At least I know my heat works! Lol. I'm guessing(hoping) the AC will work once I get the slider unstuck.
No write up necessary, as it's literally as simple as cutting out a section of hose 3" wide, and shoving a ball valve with barbed ends in there with two hose clamps. I'll grab a pic.
No write up necessary, as it's literally as simple as cutting out a section of hose 3" wide, and shoving a ball valve with barbed ends in there with two hose clamps. I'll grab a pic.
I haven't worked on the Vette, but based on other cars I have the thing you're interested in is coolant flow through the heater core, not the door. The door typically would open for things like heat and vent and close for a/c IIRC. Shut off coolant flow through the core and you should not have any heat entering typically but would have air flow.
Admittedly I haven't worked on a Vette for this, but I have on some Chevelle's, Cutlas' and Torino's with manual controls and that's basically how they worked.
Good luck. Let us know how it works out.
You're probably right. I think there are multiple issues. The valve isn't working right-even zip tied closed there is still heat flowing. The controls are also stuck, so something is going wrong there as well. As always with this car, I don't think there is a simple answer.
I took the control unit out of the dash finally. It's still well and truly stuck. I sprayed some WD 40 on everything, no different. It doesn't look rusted. Something is just stuck. I don't even think it's the cable-it looks ok to me and doesn't feel like the issue. Attaching pics-anyone have any idea?
im sure you have done this but havr you tried pulling the and moving the canle by hand?
also, from doing my heater core i remember the blend door. maybe the hinge down at the blend door is rusted.
you could remove the heater box cover from inside and check.
have you checked if the lever is rusted in the hvac control box?
i tried moving the cable by hand-hard to grip it though so not sure that is conclusive.
The blend door is what I'm afraid of. From hearing everyone talk it will be a PITA. I was hoping it was something simple with the controls. It really feels like the lever itself is jammed, but I could be mistaken.
The blend door door is next on my list if the controls aren't the issue.
What do you mean would be rusted in the control box? Is that what I sent pictures of? If so it looks pretty clean actually. A little gunk but nothing I'd expect to cause it to freeze up.
On on the bottom it looks like there is a small box with a vac line going to it. There's a plastic arm coming out of that box that I can't tell but might be blocking the slider from moving. They at least seem to be connected. Could that be it?
Took the whole thing apart. The linkage cable appears to have been the issue. I can move the blend door manually. Anyone know where I can get a new linkage cable?
How to block off heater
