If the defrost heater fails or the defrost timer gets stuck, ice builds up around the drain. If the drain line passes too close to a cold surface, the water inside the tube freezes before it can reach the evaporation pan. Ice expands, creating a solid plug.
This is the number one culprit. Over time, dust, food particles, and a sticky bacterial secretion called biofilm slide down the drain. It acts like liquid glue, slowly narrowing the passage until it creates a solid plug of black, slimy gunk. fridge drain blocked
Before you call a repair technician and spend $200 on a service call, or worse, start shopping for a brand new fridge, take a deep breath. In the vast majority of cases, that puddle isn't a sign of a dying compressor or a failed seal. It is likely the work of a tiny, often overlooked culprit: If the defrost heater fails or the defrost
Every three months, pour a cup of hot (not boiling) water down the drain. If you want to be proactive, use hot vinegar. This keeps the biofilm from ever building up. This is the number one culprit