The heater control knobs are held on by small allen nuts. Just loosen them and
the knobs pull straight off. But don't do this until you check out the linkage.
For the temperature control, disconnect the linkage at the control valve on the
firewall (engine side) and then attempt to move the control. If it works OK,
then the control valve is stuck or sticky. If the linkage is still stiff, you
can attempt to oil it or replace it.
For the selector control, you will have to try the same ritual at the heater
box. If you have very small hands and arms, you will be able to get to it with
no problems. Normal people end up scratched and bleeding, cursing and swearing,
while upside down with a gear lever up their back. No big deal, right?
Vic Whitmore
76 Spitfire
Thornhill, Ontario
Ryan Smith wrote:
>
> Also while lurking behind my dash panels I want to figure out how to
> loosen my heater controls. The fan on/off and the direction switch is
> operable if not a little stubborn. The hot/cold lever is practically
> frozen. I 'can' move it but it feels like I'm going to brake the
> linkage, and as far as I can tell there is no difference between the
> cold and the hot positions in terms of heater output temperature. Is
> there something I can lubricate? I can't really tell where that
> hot/cold cable is going without pulling the heater box, something I'd
> like to avoid if possible.
>
> thanks again
>
> Ryan Smith
> 72 Emerald Green Spitfire
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