Too Hot

I have the Aspire Pegasus with Triton tank. Running .04ohm coil. Battery is a IMR18650 3.7v 3100MAH 40A

It's worked perfect since I got it 3 months ago but out of the blue tonight it pops up with a Too Hot Error. I've left it alone for a couple hours no change, tried 3 batteries (1 brand new), Tried 4 wicks all .04ohm and it still reads Too Hot.

Any Ideas on how to remedy this?
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