When the MDB7749SBM misbehaves, the pattern is nearly always the same: check the sump filter, the drain hose loop and the disposer knockout first, then the drain pump, check valve or sump filter. Trailing characters after the model number identify the production run, and the rating plate is what settles which parts fit.
Useful things an owner can do: clearing the filter, checking the spray arms spin and loading properly. Anything that requires a panel to come off should wait for a technician.
Key Features
- Adjustable upper rack on variants that list it
- Built-in 24-inch dishwasher cavity
- Upper and lower spray arms fed from one pump housing
- Filtration at the sump on later builds
Most Common Issues on This Model
01
Dishes coming out wet on a heated-dry cycle
02
Control panel buttons responding intermittently
03
Detergent cup not opening during the wash
04
Leak appearing along the bottom of the door