Another tecchie one
We used to have a printer/copier in the office, and it would go wrong. After working fine for months, it would start acting up. The engineer would come out and announce that he could find nothing wrong, it was working perfectly - but after he left it would be just as bad. Then, a few weeks later it would be working perfectly again for several months. This went on for two or three years.

Eventually, someone worked it out. In spring and autumn, for a few weeks, the sun would be at exactly the right low angle for part of the day to shine in throw the window and into the works of the machine, confusing its sensors. Of course, when the engineer came, he would stand with his back to the window and block the sunlight...
(moon monkey is busy making memories worth repressing, Tue 18 Oct 2011, 12:56, 4 replies)

Again, this is another amusing story that fits the qotw
Please make sure that all subsequent replies are of a low enough standard that /talk can understand and then mock them.
( emvee cruor deo cruoris, Tue 18 Oct 2011, 14:13, closed)

Can I just say
Brilliant! Apart from 'throw'.

Low enough?
(bat_fudgie, Tue 18 Oct 2011, 22:08, closed)

Great heavens, Carstairs, I seem to have committed an unspeakable act!
I shall not ninja edit, as a penance for my shameful error.
(moon monkey is busy making memories worth repressing, Wed 19 Oct 2011, 9:21, closed)

similar
We moved into a brand new office a few years ago and the air con would be on full tilt almost all day making the place freezing. In fact the only time it was warm would be first thing in the morning.

Turned out that some bright spark had located the main laser printer directly below the thermostat.
(Greencloud Wanted to go fishing on, Tue 18 Oct 2011, 19:41, closed)