Hi Linda,
We had a similar problem.  We have the working fan inside the cabinet, and 2 fans (taken out of old computers) blowing onto our top fitting.  They aren't connected to the TC/EA power they just plug into the wall.  
But if you find an external source let us know!

On 10/10/14, "Reynard, Linda" <[log in to unmask]> wrote:
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Dear Isogeochemists

Has anyone replaced the lower fan in a Thermo TC/EA (12 VDC, 250 mA), the one that blows on the lower part of the column? Ours has started making a louder-than-usual noise and I worry that its days are numbered. Thermo will sell us one very expensively.

Any other sources for a replacement? If you have made the swap, how did you connect it to the TC/EA power source?



Dr Linda Reynard
Department of Human Evolutionary Biology
Harvard University
11 Divinity Avenue, Cambridge, MA 02138 USA
tel: 617 495 8053