The following link gives some advice on how you may be able to get rid of those sour or moldy smells coming from your front load washing machine:
Many of these tips are now included as part of the owner/operator manual due to the high number of complaints from consumers. The most persistent cause of foul odors is:
1. Not leaving the door open when the washer is not in use. This allows the tub to air out and keeps any residual water from becoming stagnant. It also prevents mold and mildew from growing in the wash tub.
2. Small items of clothing getting caught in the rubber folds of the door bellow. Socks are notorious for ending up in this area. If they are left there for significant periods of time, they will sour and mildew. Check this area after each wash.
3. Items caught in the trap of the drain pump. Cotton swabs, toothpicks, garment tags, are all common things I have found in the drain pump that can give off foul odors if left for long periods of time.
4. Using the wrong type of detergent. If you use regular detergent it can leave accumulations of soap scum and deposits. This sticky mess can also trap dirt and debris that cause odors. It can also cause premature wear to the drain pumpand seals. Use HE detergent only. Failure to do so will void the warranty on MOST new models.
If the door bellow has alaready begun to mildew or mold, you can remove it by using a non-abrasive scrubbing pad and a 50/50 solution of bleach and water. The green scrub pads you use in the kitchen are considered non-abrasive. DO NOT use steel wool. If the mildew is too bad, you will need to replace the door bellow to get rid of it.
If you need to replace the door bellow the following link explains how:
If you need to check the drain pump for debris, follow this link:
The preventive measures DO work if you get into a routine of following them. I personally own one of these washers and have never had an odor problem in the 9 years I've had it.
If you have any questions, please let me know. I hop you find this information helpful.