I have about 5 years old kenmore upright freezer and it's not freezing
anymore.
it seems when compressor start to push cold air it turns off by itself
after 10 seconds.
It'll restart like 10-15 minute later or after I open and close
freezer door but compressor is not
running more then 10 seconds.

I thought it could be defrost timer so I forced timer to go off
manually but still compressor is not running
more then 10 seconds.. I noticed defrost tank is really hot all the
time and coil is very clean.
I need help to locate the problem.

Any suggestions would be appreciated and thank you for reading this.