Fan Not Ramping? Options

[SteveM]

I have a Falcon
Its in quite a small area so runs quite hot
but has been happy with this for 3 years

Its never been opened
Last week it had two red lights

I repasted the gpu
heat transfer isnt a problem as the heatpipe is boiling

The fans sounded normal

Ayway it was still having two red lights

Last night i did it again
and also did the cpu this time

Its transfering the heat just fine

but after a few hours of a game it two red lights
if the central heating is on

on looking into this deeper the fan speed isnt ramping up
when playing games

So i dont think its a problem with the heatsink's at all
rather the fans not being sped up

has anyone ever run into this?