Hi and thank you for using Just Answer
Your problem could be listed as a few things ... first I'm going to switch this to Q&A so we can have more time to work on your problem. Even though it will say our chat has ended, you can simply reply by following the directions listed and I will receive your answer.
The flashing is telling you the freezer is out of temp ... it would be the high temp alarm. So when you noticed it did you hear any noises? Any humming or anything? If your unit is still running, can you place your hand on the compressor and tell me if it's just warm, or is it hotter? As for the temp. control ... if you would turn it off, wait for two minutes, and turn it on to the coldest setting can you tell me if you hear a click? The more you can explain the better it would help. Thanks