My Land Cruiser Sahara has an intermittent rattle in the fan, sounds like a leaf but I sense it is more electric like a solenoid clicking.

Thanks I knew about the aircon leak - my main concern is that if I go to a country outfit who then remove my front dashboard facia to find out where and how the noise arises. The potential is for a major disaster. I am assuming the stuff under the dashboard is not able to be reached from the inside of the engine bay through the firewall. Is diagnosis possible through any means other than dismantling the dashboard. Hands on inspection per your suggestion sounds frightening. I am asking for a referal to a qualified expert in this area.