The appliance has an odour.
Are you using the appliance for the first time?
The smell is caused by rubber material that is attached to the appliance inside. This kind of smell is a rubber's own smell and disappears automatically after using the appliance several times.
Do you smell an odour during use?
Do not exceed the manufacturer's recommended amount of detergent when washing clothes. Excess detergent can build up on clothing and cause odours.
Leaving clothes in the washer or dryer after the cycle ends can lead to odors. Unload clothing promptly when the cycle ends.
Keep lint filters clean. Clogged or dirty lint filters can cause odors. After cleaning the lint filter, allow it to dry completely before using it.
For ventless models, leave the dryer door open after drying, or use the magnetic door stop (on some models) to keep the door slightly ajar.
If the odor is coming from the washer, follow the instructions in the product manual to clean the washer tub/drum.
Periodically run the Drum Care and Condenser Care cycles following the instructions in the MAINTENANCE section.