Did I read your post correctly? You have a fan built into your unit? Mine does not have one built in. Mine sitting on top a laptop cooler.
I have found I I don’t touch it I don’t know if it’s hot… well my cat seems to thinks it a warm place to nap (yes, I have things in place to keep her off - but you know cats) 
Yes it does, its the Quad with the 1TB internal drive. Even with the fan it was surprisingly hot. Before I read the community comments I was ready to call Tablo Support…
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So does this indicate Tablo knows they run hot, and want to reduce warranty exchanges on the units that they sell complete?
Tablos definitely produce heat.
I don’t think they get hot, just warm.
My wife, and mom disagree.
They say you can cook eggs on them.
I have 2 Tablo 4-tuner units on the top shelf of a bedroom closet.
His, and hers.
I don’t share my Tablo.
Both use wireless to connect to the wireless router on the shelf below.
I don’t like wires. 
Enabling wireless on a Tablo generates even more heat, which comes from the wireless chip.
No coolers.
No fans.
No ice cubes.
They work flawlessly.
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I started this thread and… I think I may be coming full circle. Even though the fan I was using was silent, I didn’t like the amount of dust it attracted, so I thoroughly cleaned the Tablo inside and out and I’ve been running it without any external cooling for about 6 weeks now. The unit is always warm and will get hot when in use, but it’s been working fine, and the 1TB samy SSD sitting inside will get as hot as it will get. I’m not checking. So far so good.
My Tablo Quad runs warm but not too hot to the touch. I have other electronics that generate more heat.
My small 120 Gig external drive never gets warm even when recording two or more shows at the same time. The Table gets slightly warmer.
Just for fun I placed a laptop cooling tray under the Tablo and in less that 1/2 hour the Table had no feeling of heat. The fan is off and the Tablo still does not even feel warm and hour later. Not watching or recording at the moment.
Will test the fan this evening by recording a couple of movies at the same time.
SSDs are great (I’m using one), but they seem to run much hotter than a standard hard drive. If having a heat issue with the Quad, maybe just use a standard drive in the internal SATA drive bay.
For a while I used an external USB Samsung T5 drive (now model T7), for whatever reason that never got warm at all and worked well.
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