Whirlpool Washer Smells Like Mildew - Causes & Fix

Whirlpool Washer Smells Like Mildew — What’s Happening

A mildew smell in your Whirlpool washer is not an error code or electronic fault. It signals trapped, stagnant moisture or detergent residue that has grown into mildew somewhere inside the machine. Whirlpool identifies the problem as a maintenance issue rather than a component failure.

On front-load washers, the odor most often hides in the folds of the rubber door gasket and inside the detergent dispenser drawer or its housing. Top-load models can trap moisture around the agitator and under the agitator cap. Wet laundry left in the drum after a cycle and too much detergent both feed the buildup that causes the smell.

Jump to Fix

Most Likely Causes

• Dirty or damp door gasket Moisture and residue collect in the folds of the rubber boot on front-load models, creating the most common mildew breeding ground.
• Detergent dispenser buildup Soap residue and water sit in the drawer or housing, turning into slime and odor over time.
• Too much or wrong detergent Excess detergent leaves a film on internal surfaces that feeds mildew growth.
• Leaving wet clothes in the washer Damp laundry sitting in the drum after the cycle finishes keeps moisture trapped and promotes odor.
• Infrequent or missing tub cleaning Skipping the Clean Washer cycle or manual cleaning allows biofilm and residue to build up on the drum and hidden surfaces.
• Dirty agitator or agitator cap Top-load models trap water and detergent under the agitator cap and inside the agitator body, which can turn into mildew if not cleaned regularly.
• Closed door or lid between cycles Keeping the door or lid shut after use traps humidity inside and prevents the drum and gasket from drying out.

How to Diagnose and Fix

1. Open the washer door or lid and inspect the drum, gasket folds, and dispenser drawer for visible slime, residue, or black spots.
2. Pull the detergent dispenser drawer completely out and check both the drawer and the cavity behind it for buildup or sticky residue.
3. On front-load models, peel back every fold of the rubber door gasket and wipe all surfaces with a damp cloth to remove trapped debris and moisture.
4. On top-load models with an agitator, remove the agitator cap if possible and clean the interior and cap surfaces.
5. Run the machine’s Clean Washer cycle if equipped, or run the hottest empty cycle using an approved washer cleaner or affresh tablet.
6. After the cleaning cycle finishes, wipe the drum, door or lid, and all gasket and dispenser surfaces dry with a towel.
7. Leave the washer door or lid open for several hours or until the next load to allow all interior surfaces to air-dry completely.
8. If odor persists after cleaning, check the drain filter or pump area for debris and inspect the drain hose for standing water or residue.

Parts You Might Need

Related Error Codes

If your appliance also shows a code on the display, these match this problem:

• Whirlpool Washer Drn error code
• Whirlpool Washer F02 error code
• Whirlpool Washer F0E1 error code
• Whirlpool Washer F1E1 error code
• Whirlpool Washer F1E2 error code
• Whirlpool Washer F20 error code
• Whirlpool Washer F21 error code
• Whirlpool Washer F2E1 error code
• Whirlpool Washer F3E1 error code
• Whirlpool Washer F3E2 error code
• Whirlpool Washer F5E1 error code
• Whirlpool Washer F5E2 error code

When to Call a Pro

Call a technician if the mildew smell continues after you have cleaned the gasket, dispenser, agitator, and drum and run multiple hot cleaning cycles. Persistent odor can mean hidden biofilm in the outer tub, drain pump housing, or drain hose that requires disassembly to reach. A pro can also inspect and replace a door gasket or dispenser housing correctly if those parts are the source and cleaning has not solved the problem.