GE GFE28GMKUES FF Compartment Temp High by 4 Degrees

[igndoc]

GE french door refrigerator purchased new in April '24. Since new the FF compartment temps are warmer than desired. I have set the refrigerator temp as low as possible (34F), and the freezer at +2F.  Freezer maintains zero F with normal variation.  The coldest the refrig compartment can maintain is 38F, with coldest readings of 36 for short periods, and much time spent (hours) above 40F. I've measured via glasses of water on all three shelf levels, using several instruments (thermocouples on DVMs, instant read Thermopen, and a stand alone data logger that transmits via bluetooth. There is only one degree F variation between shelves, and no obstructions of airflow from any vents. Air movement seems normal. Turbo setting does not affect the operation in any way (fan(s) nor compressor).

There have been two service calls by a GE (Bodewell) technician. On the first visit, the tech stated that the operation was normal. I disagreed and phoned GE customer service to get some additional assistance. A second technician visit: He measured the temp at the evaporator outlet at the top of the air column (thermocouple placed on the thermistor) and verified that the actual temp was four degrees higher than the refrigerator data was indicating the thermocouple was reporting. Neither technician visit showed any fault codes. Software is up to date.

He ordered a new main board and will replace that this week when it arrives. He has not yet planned to replace the thermocouple.

Several questions: 1) Is this a known concern? 2) Which is more likely to be the cause; mainboard or TC? 3) Why doesn't GE allow their technicians to have a field adjustment of offset to allow the set temperature to align with the actual performance (such as with an oven)? 4) Finally, if the parts replacements don't correct the issue, what else should be investigated?

Thank you for any and all assistance you may offer.