Hello Chaps, Chapesses,
Having some luck sorting out a few electrical bugs recently on my UK roadster, mostly thanks to you fine folks! Latest on my list is the heater fan, that decides its own fan speed as the **** is turned. Generally it wants to go faster than it says on the dial, but once it settles, it's fine. More of an annoyance than anything, but I'd like to fix it. I'm guessing that it's dirty contacts, but I'm looking for pointers on how to get to it (without wrecking the panel) and what to look for. Any help would be appreciated.
On a secondary note, has anyone had thier car/any car vinyl wrapped? Now that I'm getting around to fixing the things that have bugged for some time, I'm beggining to love her once again and I'd like to treat her to a wrap in a semi-matt vinyl. Maybe British Racing Green, but I can be pursuaded otherwise!

 

There is a connection on the back of the control board that gives problems as you describe. Also there is a small potentiometer on the dial controls that contributes to the problem you describe.
Go to the section on this forum "TBS and How To Articles" and open it. Then scan down the page and find a Thread "Index of Crossfire problems and repairs". You will find a PDF with pictures that will correct your problem with the A/C.
Make yourself familiar with the "Index of Crossfire Problems and Repairs" It is a gold mine for DIY courtesy of forum member onehundred80.
And here is a link to the potentiometer fix : A/C potentiometer

 

IT can even be the "Blower REsistor" which is a very easy fix. I'd change the 'resistor' first, and if that does not do it, go after the pot in the control console.

 

My cheapo resistor never worked straight out of the box, so get a known brand.
Or as pizzaguy says it could be the 'pot'. CLICK

 

I'm in agreement with others to pursue the Blower Motor Resistor first, and work your way to the issues behind the HVAC Control Module. With my 2007 Coupe, I took on the HVAC Control Module Loose Connection between Boards described by CL770. This fix can be somewhat tedious as it is important to keep the Control Module Flow Control ***** in the same position as removed so that alignment with the Receiver Shafts inside the Upper Console remains the same. And even after I did this repair, I still had to go back & replace the Blower Motor Resistor to restore full HVAC Fan Control. (Note: It was much easier for me to re-install the HVAC Control Module after I removed the HVAC Vents located right above in the Upper Console. Gave me some visual access for aligning the Flow Control Shafts on the HVAC Module with their respective Receiver Shafts located inside. FWIW)

I have not done the potentiometer repair that has been mentioned here, as it was discovered & posted by a Crossfire Owner after I had addressed the loose board connection, but it's only a matter of time. When you have the Upper Console apart & the HVAC Control Module out, I'd do both fixes. Do you really care which one actually takes care of the problem? NOT ME! I just would not want to go back into the Upper Console again.

 

Here's another trick I used to re-align the Control Module Shafts with their respective Receiver Shafts. I used a couple of short sections of Split Wire Loom to help me get the Control Module Flow Control Shafts to align & inserted into the Receiver Shafts.