Location of frig thermistor or removing the air diffuser cover

Brand: Maytag
Model Number: mrt118fffm00
Main Symptom: inconsistent temperature in frig
What happens & when: temperature is ranging from 40 to 50 degrees. I’m trying to replace refrigerator thermistor, but cannot locate it. I am thinking that it is located somewhere in the refrigerator diffuser. I am unable to remove the plastic housing from the frig diffuser. Removed screw in it fattening it to the top of the refrigerator box, however still seems to be something holding it to the bottom of the piece on the right.
Any help with the frig thermistor location or how to remove the diffuser cover of is appreciated.

Error Code (if any): n/a
Parts or tests already tried: replaced freezer thermistor, defrost heater and capacitor.
Photos / video link:

Look here: https://www.youtube.com/watch?v=V0eaQVCCveI

The thermistor should be sitting just above a rectangular cover, right behind and a little to the left of the temperature control housing.

For future reference, if you ever need to get into the diffuser, start by removing the bottom cover of the diffuser. That’ll expose a screw at the bottom of the diffuser housing—once that screw’s out, you’ll have access inside.

Thank you both for your responses. Unfortunately that location is not present in this model. Any other thoughts? I did not see it either inside the control housing or the refrigerator diffuser housing. Please advise. Thanks in advance.

Would you be able to provide a picture of the entire fresh food section ceiling?

Probably like in this video then is the location! Well Maybe! Sounds like you look there already?? https://www.youtube.com/watch?v=gCJDsZ7dG6I

Bigbuck1—This is really helpful. I thought it might be in there, but I could not separate the cover from the rest. This video shows how to do it and where the thermistor is located. Thank you so much!

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Hope that repairs it!