Electrolux upright freezer fitted new genuine thrmostat as customer said it kept on running. He says it is still the same with new stat.It is kept out in the garage.
Any other thing it could be 😕
Mike
What temp is it acheiving,if the system is ok and it’s running constantly then would expect the temp to be-25 or lower.
Check the cabinet temp with a decent thermometer.
Compressor wear could well be the problem @10 years old.