What's the most common issue you encounter when using Antminer?

One of the most common failures of ASICs is overheating of chips and their failure. Usually, the further the chip is from the front fan for blowing, the higher the temperature. And ASIC power supplies do not like voltage drops in the power grid.
Temperatures can be a real headache. They vary widely from place to place, sometimes hot, sometimes cold. But is too cold always better than too hot? High temperatures can be solved with a heat sink, but what about low temperatures?
Do you mean the miner is running in an unheated room that is 30f or 0c
Most miners do not like temps like 30f or 0c
But that is not the miner that is the super cold room they are in.
Much like running a miner in a 45c plus room or a 113f room
Those are simply poor places to run a miner