Key takeaways
- Find and remove the source first; baking soda only helps afterward.
- Check hidden spots: drain pan, defrost drain, ice bin, filter and door seals.
- Burning, electrical or chemical smells mean unplug and call a pro.
- Odors that return fast after cleaning often point to a drain or cooling problem.
Find the Source First
A bad smell almost always has a hidden source. Masking it with baking soda helps only after you remove that source. Here are the most common places odors start:
- Spoiled food hiding at the back of a shelf or bottom of a drawer.
- Spills that soaked under the crisper drawers or into shelf edges.
- The drain pan under the fridge, where melt water sits.
- A clogged defrost drain holding old water inside the fridge.
- The ice maker and ice bin, where old ice absorbs odors.
- The water filter, if it is old.
- Door seals, where food and moisture collect in the folds.
What the Smell Tells You
| Smell | Likely source | What to do |
|---|---|---|
| Rotten or sour | Spoiled food or spilled milk or meat juice | Find and toss it, clean the area |
| Musty or moldy | Drain pan, clogged drain or dirty seals | Clean the pan, clear the drain, clean seals |
| Smell in ice or water | Old filter or stale ice | Change the filter, empty the ice bin |
| Chemical or sweet | Possible refrigerant leak | Call a pro |
| Burning or electrical | Overheating part or wiring | Unplug right away and call a pro |
| Fishy with no fish inside | Overheating electrical part | Unplug right away and call a pro |
Safety first: a burning, electrical or strong chemical smell is not a cleaning problem. Unplug the fridge and call for service.
How to Deep Clean a Smelly Fridge
- Move food to a cooler and unplug the fridge.
- Toss anything spoiled or past its date.
- Remove shelves and drawers and wash them in warm, soapy water.
- Wipe the inside with a mix of warm water and baking soda (about 2 tablespoons per quart).
- Clean the door seals, getting into the folds.
- Dry everything before putting it back.
- Put an open box of baking soda on a shelf to absorb leftover odors.
Check the Hidden Spots
The drain pan
Many fridges have a pan under the bottom where defrost water collects and dries off. It can grow mold. Remove the front grille and slide it out if your model allows, then clean and dry it.
The defrost drain
If water sits at the bottom of the fridge or freezer, the drain may be clogged with food bits. A clogged drain often smells musty. See our leak repair page for more.
The ice maker and water
Ice absorbs odors. Empty the bin, wash it and throw out the first new batch. If water tastes off, change the filter. See our water filter guide.
How to Keep Odors Away
- Store leftovers in sealed containers, and label them with the date.
- Clean spills right away, especially meat juice and milk.
- Do a quick clean-out once a week before shopping.
- Keep the fridge at 37°F. Warmer fridges let food spoil faster. See our temperature guide.
- Change the water filter about every 6 months.
- Replace the baking soda box every few months.
When a Smell Means a Repair
If the smell comes back fast after a good cleaning, something mechanical may be causing it. Common causes include a clogged drain, a fridge that is running warm and spoiling food, or a failing part that is overheating.
Smell keeps coming back?
We find and fix the cause, from clogged drains and defrost problems to fridges that are not holding temperature.
Defrost system repair · Refrigerator not cooling · Ice maker repair