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To me it sounds like, from what I am reading that your compressor may be the root cause if it is short cycling and you changed the thermostat and moved the thermocouple and the problem persists. Was this working fine till recently or did you just aquire the freezer and noticed it is not performing correctly?
Here's the simple procedure I use whenever I run into one that's 'short-cycling' (trying to start, clicking on/off every few seconds, or in some cases, every minute or two).

Basically, using a digital ohmmeter, you pull the compressor's relay and overload off its three terminals, then check the resistance between each of these three pins. Older relays looked a bit different than the solid state ones, but pull off pretty much the same way.

First note the two pins that read the highest resistance. The one that remains is the 'common', to which one end of both the start and main windings connect. (The common's not always the top pin, so you'll want to do this test to be sure)
Reading from that common to each of the other two, carefully note each reading. Then measure back across the two with the highest resistance, ignoring the common. That reading should be the exact total of the two individual coil readings, because you're reading through both coils in series now.

If those two sets of readings aren't within about 1/2 ohm of each other, then one of the compressor windings is shorted, and if it runs at all, it'll run hot and usually end up short-cycling on its overload protector. If the windings test OK, but it still won't run, then I connect a test cord and try to run it manually. If I can't start it that way, it's most likely a mechanical problem, most often binding bearings, and the 'bottom line's the same: either the compressor or freezer will have to be replaced.dcramer531_131.jpgdcramer531_132.jpg

Did the new thermostat come with an adjustment screw in the back? if so you might want to play with that as that can also cause this issue if it is not set correctly.

True 49 cu. ft.... | Answered on Aug 20, 2016


Did someone attempt to charge this unit with refrigerant?

True TS-49F... | Answered on Jul 12, 2016


Hi,
SOunds like you need to have it checked for a low charge as this unit is a cycle defrost and if low on freon this will happen. As the thermostat won't cycle at its not filling the evaporator enough to register. Good Luck

I’m happy to help further over the phone at https://www.6ya.com/expert/gere_bf68e6055dd61249

True TDBD-96-3... | Answered on Apr 15, 2016


we specialize in true freezer repair in illinois. Is compressor running or fan under unit? if not the thermostat may be bad.

True 49 cu. ft.... | Answered on Jan 26, 2016


You may have a defective thermostat..

True 49 cu. ft.... | Answered on Nov 11, 2015


Hello, their are heat coils in the doors, their maybe a issue with the door heat circuit controls.

True 72 cu. ft.... | Answered on Nov 11, 2015


Dirty coils, or refrigerant getting low

True Freezers | Answered on Nov 11, 2015


Their are no such digrams to tell about the coils and how they run to the compressors

True 49 cu. ft.... | Answered on Nov 11, 2015


If it gets to temp, you may have a defective thermostat. If not getting to temp. You can many other diffrent issues..

True T23F... | Answered on Nov 11, 2015


Most all true units have digrams on the unit. May have to pull covers to find them

True Freezers | Answered on Nov 11, 2015


Sounds like to have a defective defrost timer

True 49 cu. ft.... | Answered on Nov 11, 2015


Most likely You have a bad thermostat.

True 40.6 cu.... | Answered on Sep 27, 2015


SEALED SYSTEM REPLACING COMPRESSOR ON COMMERCIAL FREEZER

True 72 cu. ft.... | Answered on Sep 16, 2015


REPLACING TRUE AIR FREEZER COMPRESSOR

True 23 cu. ft.... | Answered on Sep 16, 2015


MIGHT BE BAD TERMINATION SWITCH.

True 72 cu. ft.... | Answered on Sep 16, 2015


TRY TO ACID WASH CONDENSER. AND CHECK IF YOUR YOUR EVAPORATOR MOTORS ARE RUNNING.

True 49 cu. ft.... | Answered on Sep 16, 2015


HOW TO REPLACE COMPRESSOR ON TRUE AIR COMMERCIAL FREEZER

True 23 cu. ft.... | Answered on Sep 16, 2015


REPLACED COMPRESSOR ON FREEZER TRUE AIR 3/4 HORSE POWER 115V

True Freezers | Answered on Sep 16, 2015

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