If it is less than 2 years old and doesn't have physical damage, and you have the receipt you could try to reach out to Horizon to warranty the ESC. They will likely want to see a video and you may have to ship it back to them.
If not, FYI the Firma 160 is a rebranded Hobbywing Max6 (excellent ESC). However, if you want additional beef and don't need the smart functions then look to the Max5.