That is 16 C. First one is the 1 blink.
At room temp it maybe can have that errorto read 16 at around 21-23C . It is not a calibrated thing.
But if outside is colder you can’t read 35 or 53. That is some thermal sensing problem. turn off thermal stepdown and turn it to timed 1 or 2 minute if it keep turbo for that time.