On Order

I have an 82 5spd and the fan occasionally turns on full blast all by itself. After about 1 minute or so it goes back to its original setting. I thought this was a common problem. Is it a simple fix?

Randy V

If I recall correctly, this condition has been referred to as 'Magic Blower Syndrome' and is caused by an intermittant failure of the 'resistor pack'.

For a more detailed diagnosis try doing a search for the above-quoted terms at the Rennlist email list archives.

shaaark89

randys right. basically the resistor pack has a bimetallic switch in it. if it heats up enough, the switch activates and bypasses the resistor pack causing the fan to run at full speed. i think this may have been meant as a safeguard to prevent overheating in the climate control system, but most people feel its just a nuisance. it can be fixed by manipulating the bimetallic switch.
look at tony h's site to see how (look under air recirculation flap): http://members.rennlist.com/v1uhoh/
btw, the design seems to have changed sometime around 88 or 89. the schematics show that this switch no longer has the same function.

On Order

Thanks for the info. His sight looks very helpful.