Just out of curiosity - Have you tried
SpeedFan?
Sure helps my workstations out, but come to think of it I haven't tried it on my HP Laptop...
Think i will try my own advice now

and see what happens!
UPDATE:
Okay, I had no fans, or temp sensors show up, so it's non-functional for me. You may wish to give it a shot - you can vary fan utilization based on temperature. But only if the sensors that run the fans show up...
Hope it helps you, but on my HP Elitebook 8530p it's a no go.