hokiefan

Occassionally the RPM sight glass fogs up - any insights into cause and solution? Does not appear to be condensation but rather a milky look that appears and then seems to go away on its own. Rest of the cluster is fine.... On my 1988 911.
Thanks_

J. Brinkley

humidity
my87 does the same

mamoroso

Same here... It happened for the 1st time after the heavy rains we had in the past weeks because of hurricane Ivan.

james hadley

Happens to my 86 several times a year in ME....after a rain and cool morning but goes away after it warms up.

DGaunt

My '76 fogs the left guage cluster, and I have ranted about it for years. I could not understand how a sealed housing in an enclosed space could fog up unpredictably. Well, turns out I had it all wrong. The instrument is NOT sealed, in fact, there are so many places for humid air to get into it, they are too numerous to mention. Also, the back of said clusters are in the front trunk's uncontrolled climate. So, it is hot and damp n one side of the glass--or cold and damp-- and cool on the other when the A/C is running. Voila--fog. can't see anything you can do about it but embrace it as one of those endearing quirks all P-cars have.