freezer works Frig is warm

Well I cleaned the coils, checked the fan and went through the service manual settings/ checks and I just placed a thermometer in the there. I don’t know how lowthe temp will go. any insights let me know
thanks
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i have it in the forced defrost mode to see what happens. the condenser in the back is fine I just don’t see the flap i see the connection between the fridge/freezer just no air is coming through.
thanks. I also checked the control board diagnostics and it said that the defrost thermometer is shorted or closed. let me know