What kind of fridge?
Is the freezer cold but not the fridge portion?
My 2020 Magnitude has a Whirlpool and it started acting up a couple weeks ago. I thought it might be a heat issue too. But after troubleshooting and narrowing it down to the thermostat, defrost control board or the evaporator fan, it turned out to be a bad evaporator fan. I got a replacement for $20 on Amazon and I replaced it in about 20 minutes. Very easy to access from the front of the fridge. You just remove the evaporator cover in the back on the freezer.
These fans fail frequently so if you don't hear the fan running in the freezer, then it is likely a bad fan motor.
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