How do I clean noisy / blocked TZ fan?

[pixelrunner]

I have a Vaio TZ with SSD that is now reaching 2 years of use and the fan started recently to constantly make a whirring noise. My guess is that it is blocked by dust (or could there be any other reason?). Changing the CPU Fan Level in the power saving panels changes nothing about it.

We have 6 Vaio TZ here, and this one is the only one acting up. The other 5 are completely silent.

If it is about cleaning the fan, how can I go about it? If it could be anything else, how can I diagnose the problem?

[Blencogo]

You are right to start by cleaning the fan.

If you PM an email address to me, I will send you the generic TZ-Series manual as a PDF which should help with disassembly..