....
49 degrees C a little too close for comfort especially if overclocking. Might want to keep blades at or around 40-44 C for optimal runtime, as well as, keeping the blades and/or PSU from shutting down.
Too close to what limit? cgminer on an Ant is set to shut off at 70c.
Burning out your unit.
Check through the antminer troubleshooting and setup threads. 40-44 is optimal temperature.
70 is bye bye investment.
I think you need to stop believing what you read on these threads and do the research.
The datasheet for the product is here https://github.com/AntMiner/AntGen1/blob/master/datasheet/BM1380_Datasheet.pdf and states that the BM1380 chip has a maximum operating temperature of 125c.
The temperature monitoring chip is in the middle of each board and to allow for the temperature difference between hash and temperature monitoring chip the /etc/config/cgminer has been set at
option target '60'
option overheat '70'
Ok, run your antminer at 60-70C and report back to the forum after a couple months. 
I trust what Goxed, Sushi, Greaterninja, Palawan, and the rest of community have contributed to the support threads.
Screenshot?I trust what Goxed, Sushi, Greaterninja, Palawan, and the rest of community have contributed to the support threads.
So let me get this straight in my head
You trust the people on this forum but you do not trust the data provided by Bitmain, the manufacturer.
wow i wasnt expecting it till monday.. 
