A burnt rubber smell in a dishwasher may emanate from a rubber-handled utensil overheating during the heat-dry cycle or from a malfunctioning dishwasher part. If you believe the latter may be the case, you should get the dishwasher checked before attempting to deodorize it. When it is fixed, you will still have to get the odor out, however. You can achieve this easily using a common deodorizing remedy.
Remove dishes from the dishwasher. Wet a kitchen sponge and pour a tsp. of dish-washing liquid on it.
Scrub down the interior of the dishwasher thoroughly with the sponge to remove old food particles and other odor-trapping debris.
Pour 1 gallon of white vinegar in the bottom of the dishwasher. Close the dishwasher door and leave it alone for an hour.
Run the dishwasher through a normal wash and dry cycle.