I unplugged my chest freezer to clean it out, when I plugged it back in it won't get cold. It's in excellent condition. Never has it gave me a problem. It's approx. 5 years old. Ed V

lost most of it;s freon

When you say "cleaned", did you defrost it? And. if so, could you have damaged the internal lining? Often the coil inside the wall of a chest freezer can fracture if hit or stabbed at during defrosting.
Other than that, is the compressor running (you would hear it)? it may have overheated. If not running, see if it feels hot (siezed) or cold (no power from thermostat). If cold, put it on fast freeze and see if it kicks into life (thermostat faulty) or not (compressor fault, time for a new freezer!)
Let me know how you get on!

Well a freezer is easy to repair. The circuit goes from one side of the power cord to the cold control and down to the compressor then out to the other side of the power cord. Id the control or compressor relay is open then she won't freeze. All the parts to it are listed HERE.
From the list I see an overload for the compressor. If that one is open it won't freeze. Bypass the temp control wires to see if she runs.

If you need further help, reach me via phone at https://www.6ya.com/expert/dan_73bbd84fe1d95b61

If it doesn't get cold at all, then your compressor is not running. Which could be the start relay or start capacitor or even the compressor. The relay and capacitor are not that expensive and pretty easy to replace, but if it is the compressor then you might not want to put that much money into an older unit.

Wash it out with a mixture of 1 ounce ECO friendly bleach mixed in 1 quart of hot water.

Compressor may be bad. You can try replacing starting device that plugs into side of compressor

If it is running but not cooling enough the problem is in the sealed system.

If you started it up just after hauling it home it may have be moved around enough to get oil in the systems smaller tubing causing problems. Unplug the unit for 24 hours and let it sit. Try it again for 24 hours and see if it cools.

If not this means either there is a refrigerant (freon) leak in the system or a restriction causing the refrigerant to not flow properly.

Either one are an expensive repair. and will require a professional to look at.

fairly unusal but ...posibly vapour locked.... people transporting fridges and freezers laying them down or chest freezers standing them up in a truck or trailer (taking them to the cottage) have this problem all the time unplug it for 24 hrs should cure it Good Luck

recharge with refrigerant

This is a normal condition.  The condensor coils are in the cabinet and their job is to remove heat which is why it is hot.  You will want to make sure the freezer isn't in a tight spot where air from the room can't flow across it.  Without good air flow it will become too hot and not cool properly and lead to the compressor failing too soon.