AR300M internal fan

the internal fan used to run when new but i haven’t seen it spinning, at least the entire summer months. is this normal and is there a way to check the setting? i looked in advanced settings but couldn’t find any options.
fyi i’m running 2.264 because of wisp connection failure in 2.27.

there is no fan on the Router Model, just holes in the case for attaching external antenna.

hmm thx… i thought i saw spinning LED shadows made by fan blades.