HT4543 What to do if the fan never comes on...even when the IMAC is very hot?

I've had my IMAC for 2 months. I was using the computer for an extended period today whikle playionmg a game. Game play seemed after a while but I concluded it was due to a lot of info being "worked". Anyway, the computer was very hot after a few hours of playing. I became concerned 'cause the fans never came on. Is this typical, or should i have heard them earlier? Also, is there a manula way to engage the fans? Thanks

Just to be sure do a smc reset.
But also install any one of the temperature monitors like iSTAT Pro, iSTAT Menus, Temperature Monitor, Hardware Monitor, etc.
And if you are really concerned that the fans you can override the built in settings by using smcFanControl.

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So after a few months of using the MBP 15' Retina, I've discovered that the fans are incredibly loud even when playing flash games like candy crush or tetris.. are any of you guys having the same problem? Like all of a sudden from be quiet to unbelievably loud just as the games load. So yeah, hopefully someone has the same problem as I am having.
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Head to your System Preferences > Energy Saver and if you have it, uncheck Automatic Graphics switching, this will use the dedicated GPU and shorted battery life, but if your on power should reduce the heat and fan noise.
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<Email Edited by Host>

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Never heard the sound of the fans before updating to lion on the MPA 11" (1st rev)!!
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HT4543 What to do if the fan never comes on...even when the IMAC is very hot?

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