I went into my darkroom today and found that only after several minutes my diffusion enlarger was very very hot.

Immediately I supposed that the cooling fan has failed.

Before I take the thing apart (and risk not being able to put it back together again from lack of experience) I thought I would try and find out whether I am right in assuming that there is a fan in the head.

Anyone know about fixing these enlargers and how available parts are for them if i do indeed need a new fan?

Thanks alot,