ack! hot vents

[mikewitdaspike]

ok, first off, i love the heater in my car, in the winter it's very nice but in the summer it's a little bit... unnecessary so i keep the vent system off while driving, because i don't use AC... well, the vents still blow HOT air while i'm driving, even when i turn the little temp dial down to the cold and have the fan control on OFF, it's still blowing through... it doesn't seem to blow through the vents when i'm not moving, but when i'm moving, it comes hot through all the vents, up and down... how can i make it stop?

[sknaffl]

Have you done any dash work recently?...There is a long rod that connects the dash control for the temperature to a control on the firewall behind the dash....I know it's really easy to seperate the rod at the firewall from the control if the dash has come out...even slightly

[TheRedBaron]

Either that or the temp selection switch isn't actually selecting fresh air.

[mikewitdaspike]

i haven't taken the dash off at all, or moved it that i know of... though i dunno, usually have it on full hot 100% of the time because that's all i ever use it at though it seems something slightly more urgent has come up, so i'll keep this one on hold for a lil while

[TheRedBaron]

Uh-oh, what came up?

Try twisting the temp selection knob back and forth a bunch of times, it might catch something and set you straight. Worth a shot. Maybe pull the switch and nail it with contact cleaner.

[xww10]

My problem turned out to be the temp selection knob, someone pulled the rod with the 2 uni-joints out the back of it. The ventilation control with a thousand vacuum hoses stuck on the back scares the heck out of me

[sknaffl]

The ventilation control with a thousand vacuum hoses stuck on the back scares the heck out of me

[/QUOTE]

Yeah...my vert I just picked up seems to have a problem with that...the knob seems really stiff and air will only come out of the dash vents...regardless of what position the control is in...I'm dreading digging in there and finding out the problem

[TheRedBaron]

Yeah...my vert I just picked up seems to have a problem with that...the knob seems really stiff and air will only come out of the dash vents...regardless of what position the control is in...I'm dreading digging in there and finding out the problem[/QUOTE]It's not that hard, you can get a look at most of the vacuum connections just by taking off the lower kick panel.

Also, make sure that the vacuum lines going to the vacuum canister in the right fender well are intact and that the thing works, otherwise the heat selector will have no vacuum to use to move the vents in the first place!

[sknaffl]

if I find the regulator is bad....can I pull it out from underneath as well...or do I still have to pull off the dash?

[grif900]

dont be scared, there is a large clip that holds a rubber fitting that all of those hoses are very firmly attached to, its almost impossible to knock one of them off of the rubber fitting.

[RickyS]

Originally Posted by mikewitdaspike

the vents still blow HOT air while i'm driving, even when i turn the little temp dial down to the cold and have the fan control on OFF, it's still blowing through... it doesn't seem to blow through the vents when i'm not moving, but when i'm moving, it comes hot through all the vents, up and down...

That sounds to me like a faulty temperature control valve. Otherwise the rod at the back of the temp control switch has come off - if that happens the switch will be quite loose.

[jetman]

If the rod is in place then its the heater control valvle itself. I bodged an inline garden valve into the upper core hose of an old Saab when this went so I could turn it off in the summer. Not highly recommended...

[grif900]

Originally Posted by jetman

If the rod is in place then its the heater control valvle itself. I bodged an inline garden valve into the upper core hose of an old Saab when this went so I could turn it off in the summer. Not highly recommended...

another way to cheat is to sweat a few copper elbows together, disconnect the heater hoses from the heater valve, and connect them together.

[mikewitdaspike]

hmmm, i was driving home today and i thought about it, and i hit the little "circulate" button, and air stopped coming outta the vents at least, it went down to almost nil, so i think that'll work thanks though guys, when i have some time to mess with her, i'll check it out

[SecondmessiaH]

i was about to suggest that ^^^