Typically Mac OS X is configured to set the default printer to the last printer you just used… Â But that’s not always correct…
In some cases, people with laptops have attempted to use a printer that isn’t available, and that has caused the laptop’s fan to run constantly, since Mac OS X is attempting to retry to a printer that is no longer available. Â For example, a work printer that is not available from home…
So, if your machine is running the fan alot, check your printer queues, to see if you have orphan print jobs… Â Open System Preferences, go to Print & fax, and see if there are any print jobs stuck in the queues….