> I have a 74 and the knob states "1 defrost / 2 car"
> and when I pull it out (about an inch or so) it stops.
> At the point it is set, the defroster is engaged. I
> can feel the heat flowing up near the windshield,
> however there is cold air blowing from the other set
> of holes that go to the vents near the feet and the
> dash board.
Yep, that's right for the defrost setting....
> My question is how far does the heater knob pull out?
> Does it pull out to another notch? Mine does not come
> out any farther than what I have described and I can't
> get heat to flow to the feet and dash vents.
It should pull out one further notch, and basically all
the hot air should dump out directly from the heater box
on top of the transmission tunnel and thereafter to your
feet. Obviously something is stuck there.
> All this started when I realized that one of the
> heater hoses to the defroster was cracked. The other
> hoses are fine. I have the feeling that the heater
> knob / lever is not working right and it's not
> engaging a trap door within the heater to switch where
> the heat flows. Am I on the right track? Any
> suggestions?
Well, unless there's something jammed in the heater to
prevent the flap from opening up, I think the only thing
could be is the stop which lets you know when you're in
position "1". As I understand it there's a spring loaded
ball-bearing which goes into a detent in the rod of the
heater knob. I guess there could possibly be something wrong
with that, but I don't see how - I can see it getting stuck
completely and not letting you move the knob at all, but
I can't see how it'd stop you from going to position "2".
Of course on my '69 I have the opposite problem - the
position "1" stop isn't as firm as it could be and it's
hard to tell when it's in the right spot :-(
You could try loosening the wire on the lever on the side
of the heater box and seeing if you can rotate the lever
enough to get hot air coming out the bottom to work out
if it's the heater or the cable...
Frank Biedermann
1969 TR6 PI
Adelaide
AUSTRALIA
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