When It Hits The Fan (itch) Mac OS

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The first advice when the fan seems to be to active is to look at the processor load in Activity monitor. Proceed from what you find there...
More specifically, when I have a stuck document (in a print queue), the print queue stays open in the Dock.

Checking the activity monitor was the first thing I did, and there wasn't any unusual apps running. Also, the print queue did not stay open on my dock everything appeared normal. The fan ran persistently until I found the unwanted print job in the system preferences.
TM

one of the annoyances of Mac OS X.
I second the advice (checking activity montior) from hamarkus. I too find there a printerjob running when there is one in a queue.

SMControl solves 'always-running' laptop fan - better than using Print Monitor as a work-around

first, SMCControl will give you complete control over your fan speed (on an application level basis if required).
second, your problem isn't really the fan staying 'stuck' at max when there is no CPU load ... your problem is that a buugy app is going to town on your CPU! - so get that situation fixed!
third, it is NOT true (or at least adviseable) to 'turn off' your fan! - the default min speed is 1000rpm (which is whisper quiet, so I think you presume that the fan is not running even when it actually is! ... in fact the fan in a mbp does not become noticeably loud until 4000rpm! ... it is only the upper range of rpm (4k-6k) that has an full airplane drone effect).
indeed, higher fan speeds are actually to be preferred because they keep your machine from running crazy hot (100C) under load! - and SMControl is the only way to *FORCE* the fans to actually do their job & keep the machine cool (otherwise an over-heated machine will randomly crash or at least have a diminished operating life).
when the fan speed is bumped up to 4k rpm you can expect to clear off at least 20C of heat from the machine - enough to make it bearable to actually run the machine on your LAPTOP :-)
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To help avoid this problem to begin with, I have been rather happy with
http://www.45rpmsoftware.com/45RPM/Locamatic.html
It sets your Location, default printer, and web homepage depending on the WiFi network it connects too (and apparently the lastest update will look at the wired connection too.)
I've been happy with it.
Or MarcoPolo, or Mobilizer.

If this is a recurring problem maybe these 2 unix utilities from the cups printing system will help...
lpstat - shows status information about your printers... so you can see if you have jobs in the queue
cancel - cancel jobs

The easiest way to kill an errant running printer is not from System Preferences. All that is needed is to look on the dock and you will find the confused printer there, there just waiting for someone to tell it that everything is OK and it is quitting time. You might want to delete the print que first.

When it hits the fan (itch) mac os 7When it hits the fan (itch) mac os x

not always true. you can quit the printer queue and it disappears from the dock even though the job is still trying to print.

Funny, that just happened to a macbook I was building. The fan was on full speed pretty much all the time (unless it was sleeping).
Solution: pram reset. Not sure why, but it seems to work.

When It Hits The Fan (itch) Mac Os X

I'm sure this hint has been mentioned here before. It's become one of my first things to check when troubleshooting a slow machine.

It Hits The Fan South Park

Thanks for this advice. It totally works. I have just checked to see if i have print jobs queuing and I did have one. As soon as I deleted this my fan gradually stopped.