Heater control issues

I’ve had a prob with the Heater control in my TF since I but it. The hot cold knob won’t turn more than a quarter way round from cold, but heater is full on. I’ve adjusted the cables with no luck


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Could be a few things.
Disconnect the cable, does the cable inner extend freely when you rotate the knob?
Try moving the valve open by hand. It could be seized.
There is also a cam system converting cable movement to valve operation. This can become unhinged.

David Aiketgate wrote: Could be a few things.
Disconnect the cable, does the cable inner extend freely when you rotate the knob?
Try moving the valve open by hand. It could be seized.
There is also a cam system converting cable movement to valve operation. This can become unhinged.

Thanks for the reply David, I got hot and cold when messes with the cable at the valve end. I think like me it’s the latter, is it an easy fix ?


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Check your knobs are not broken!

Common fault....splitting on shaft, so do not turn the linkage mechanism

Just pull it out and have a look for cracked or split plastic.

G0RSQ wrote: Check your knobs are not broken!

Common fault....splitting on shaft, so do not turn the linkage mechanism

Just pull it out and have a look for cracked or split plastic.

Cheers Peter the control only turns quarter way round then stops dead


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Yeah.Its just a case of putting the mechanism on the valve into line, usually. Difficult to describe but with the cable disconnected you should be able to see the mechanism's movement by moving it by hand, and adjust it.

David Aiketgate wrote: Yeah.Its just a case of putting the mechanism on the valve into line, usually. Difficult to describe but with the cable disconnected you should be able to see the mechanism's movement by moving it by hand, and adjust it.

I’ll give it a shot, cars like a sauna lol


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If your control knob is stuck, then I think it is connected to the cable. I had an issue where the control knob could be rotated, but did not control the heating. Thas issue was solved by attaching the outer boyden cable to the center console frame, it had come loose from its bracket. But in your case I expect that the cable operation is ok, but the actual valve might be stuck, so indeed remove the footwell panel an try to move the valve by hand,

tnjk wrote: If your control knob is stuck, then I think it is connected to the cable. I had an issue where the control knob could be rotated, but did not control the heating. Thas issue was solved by attaching the outer boyden cable to the center console frame, it had come loose from its bracket. But in your case I expect that the cable operation is ok, but the actual valve might be stuck, so indeed remove the footwell panel an try to move the valve by hand,

The valve seems fine, I checked that just after I got Tif. It’s the control knob that sticks solid after a quarter turn


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