Originally Posted by darekj24
Can I disconnect AC thermostat to see if the fridge temperature would drop more than I was getting with it?
Not so much "disconnect" as "bypass". If you can read the electrical diagram, short circuit across the two wires going to the thermostat.
1) Disconnect the AC supply while working on the electrical parts.
2) Check the temp hourly-or so. With the electric heater on 100% you could start to boil the water portion of the ammonia/water mix - NOT GOOD. Confirm that the box gets below 0C on 110V then re-enable the thermostat.