NoFrost refrigerator smells bad - where is the smell coming from?

The drainage system is really often the culprit, but try checking the back wall of your fridge - with NoFrost units, condensation tends to collect there, stagnates, and starts to smell. Pull the fridge out a bit, see if there's water or dirt buildup back there, and wipe it down thoroughly. Usually that's all it takes, and the smell is gone.

Moisture, mold, and organic buildup are classic problems with NoFrost refrigerators - the smell almost always comes from areas where water pools and doesn't drain properly. Most people only think about the drainage at the front bottom, but the real issue is often further back: the evaporator and the pipes behind it collect condensation, dust, and bacteria over months.

What nobody's mentioned yet - try to get to the back of your fridge. At the very bottom of the rear wall you'll usually find a small cover or hole where water is supposed to drain out. That spot is often completely clogged or overgrown with gunk. With a simple syringe (without the needle) or a flexible garden hose you can flush the opening - warm water with a bit of vinegar in, and the stuff loosens right up. After that the water should drain properly again and the smell disappears pretty quickly.

Important: unplug it before you start messing around back there. And if the opening is really overgrown, you might also need to clean the front drainage (where the container usually sits) - it often backs up together with the rear drainage. With a bit of cleaning you'll save yourself a service call.