is it bad for the fan to run?

[josh9mille]

just upgraded to 5s and noticed my fan comes on a lot more often (duh right?) It came on when i used to run 4s at least once per set of batteries, now on 5s it comes on very frequently. Is that bad? Im running a completely stock savage flux (tires, wheels, gearing etc...) Just wondering if this is normal, or is there something i should be worrying about? It has run flawlessly since i bought it, no issues at all. Just a little concerned is all. Thanks!