I had written earlier about this fan issue and it coming on 15 minutes after turning it on without starting to use it but just in standby. I bought a seven channel amp and hooked it up. The main fan does not come anymore but the dsp board fan does. M code talked about some units having some biasing issues and maybe these units are biased toward class A and run warm, but the fan does run quite a bit. If you look at all the recievers now they have fans, including the 4311 from Denon, nice the 4308 does not as the fan noise annoys me, hence buying a separate amp, but still having fan noise.