There is still one more mod available to adjust your inside fridge temp.
Insert a 500K pot in the internal thermistor wire. That will fool the board to think the box is too warm. The adjustment is a bit touchy for me (1meg used) only a quarter of the scale is available, the 500K should get up to 3/4 of the range.
Our unit is much newer so the wire may look different. On ours the two wires are cased in a white sheath with a separate tube for each wire. I opened the sheath to access one wire which I cut and spliced in leads to the pot.
If you exceed the resistance range our unit alarms like the thermistor is seen as open, so no harm will be done. Zero resistance will be as it is not there.
Our unit had trouble in 90-100's weather, even on max cold (5), now we can run on 3 most of the time & 4 if really hot & no shade.
If you are losing refrigerant, no mods will do little to help for very long.
I also installed a Lowe's attic fan thermostat to control our external fans. Set it on 90F.
