Defrost Drain Pan [best]

The compressor is the hottest part of the fridge. As the warm compressor runs, it radiates heat upward, gently evaporating the water in the pan. That steam dissipates into the air behind your fridge.

Take the pan to a utility sink. Scrub it with hot, soapy water. To kill mold, soak it for 10 minutes in a solution of 1 cup bleach to 1 gallon of water (or use undiluted white vinegar for a less toxic option).

If you need a single paper to cite for a general overview, look for an ASHRAE Conference Paper. They are reputable, peer-reviewed, and usually cover the intersection of design, thermodynamics, and maintenance. A search for "Design and Maintenance of Condensate Drain Systems ASHRAE" will yield highly credible white papers suitable for academic work. defrost drain pan

If the defrost drain pan system fails, it usually manifests in one of three ways:

: This tube leads directly to the defrost drain pan , which is usually located at the very bottom of the unit, often near the compressor. The compressor is the hottest part of the fridge

Plastic gets brittle with age. Over time, the constant heating (from the compressor) and cooling (from the water) can cause the pan to crack. If you see a puddle of water on your floor that isn't coming from the ice maker line, a cracked pan is the likely suspect.

We spend a lot of time worrying about the front of our refrigerators: the water dispenser filter, the smart screen, or the vegetable crisper drawer. But the real magic—and the most common point of failure—happens out of sight, in the back. Take the pan to a utility sink

Carefully roll the refrigerator away from the wall. Locate the pan. It is usually a black or grey plastic tray right above the floor in the back.

Set a calendar reminder for the first day of spring and fall. Pull out your fridge. Clean the pan. It takes less time than mopping up a mystery puddle later.