How to fix a fridge that is warm?

Fixing a residential refrigerator that has turned warm inside requires a structured, step-by-step diagnostic process to locate the root cause. First, check if the interior lights turn on when opening the door; if they are dark, verify power at the kitchen circuit breaker and wall outlet. Second, pull the refrigerator out from the wall and vacuum heavy dust and pet hair buildup off the exterior condenser coils beneath the unit to allow proper heat rejection. Third, inspect the back wall of the freezer for heavy frost buildup; if iced over, test the defrost system. Fourth, check door gaskets for tight seals. You can troubleshoot internal temperatures using an independent digital thermometer. You can verify that your repair was successful when cleaning coils, defrosting iced coils, or restoring electrical power causes the compressor to kick on and cold storage temperatures return.