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Registered
Join Date: Oct 2003
Location: London Ont Canada
Posts: 3,120
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The speedo on my 86 stopped working and the auto heat defaulted to full on heat with the dial only allowing me to turn the heat on and off.I assume the speedo input tailors the heat to match engine fan speed. A speedo rebuild fixed it.The previous owner of a recently aquired 1980 installed a new headliner and "deleted" the interior temp sensor ,my controller still controls the fan but now I must use the heat overide lever to set temp.Good luck finding full details on trouble shooting many of us would be interested .
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1980 911 SC 3.6 coupe sold
1995 993 coupe
1966 Mustang Shelby clone
1964 Corvair Spyder Turbo gone
2012 Boss 302
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