My MBP (2.5 Penryn) has been fine up until the last few weeks, and now the fan is constantly on at 4-5.5k rpm. I've elevated it, put some feet under it to it's off the desk by about 2cm, I've done numerous restarts/shutdowns etc., but it's always OK for a couple of hours, then gets up there and won't go back down. I'm not doing anything - just, web/email (it was fine doing this until recently, with the fan at the normal ~2000rpm unless doing something requiring more power) and there's nothing major running in the background either in Activity Monitor.
Can anyone help?
Can anyone help?