MDB7749AWB blinking lights, won't run

Does it blink 7 times pause then repeat if so either the heating element is open or wire burnt off bad thermistor very rare or a bad electronic control if it hasn't been removed the technical sheet is located in a plastic pouch on the panel below the door on inside you will have to remove the outer door panel to perform component checks

When the light flashes 7 times it means there is/was a problem with the hot water, including a bad heater element. Flip the breaker for a minute and hopefully that will clear the error; otherwise, here's a website that will take you through resetting it.

Either the start switch, the start relay, the wires between them, the wires to the motor, or an internal fuse inside the panel, or the door safety interlock could be the problem. Even, any combination of the above could cause this. This is a real troubleshooting problem. Are you game?

sounds like anti theft device has kicked in needs to be reset dont know how to do that though

If it is a 3.8 engine change the crank sensor,they go bad on the 3.8 engines.

Your door switch is not working, the machine thinks that the door is still open.

May be the drain pump is jammed. Try to clean the area and after that try to reset the panel. Download the user manual and there must be the reset sequence.

replace the control

that is because ur head of ur printing cartridge is damaged.

remove ur cartridges black as well as color
n install only black cartridge n check d blinking of lights on ur printer if it doesn't blinks it's mean ur black cartridge is OK but ur blinking of light on ur printer is same it's mean ur head of black cartridge is damaged
after this process remove the black one cartridge and install the color one cartridge n check d blinking of lights on ur printer if it doesn't blinks it's mean ur color cartridge is OK but ur blinking of light on ur printer is same it's mean ur head of color cartridge is damaged
now take a dry cotton cloth n gently clean ur cartridges head install both cartridges on ur printer n check ur blinking light on ur printer that will work only if u r too lucky other wise u have to purchase a one cartridge.

Try putting the unit into a test mode. This my clear your issues otherwise call for service.

One of two ways to do this.
In standby (no lights) Press the combination of buttons:
hi temp wash > sanitize > hi temp wash > sanitize > hi temp wash
All lights will come on and the washer will run a test cycle anywhere from 5 to 10 minutes.
If that button comb doesn't work use:
heated dry > sanitize > heated dry > sanitize > heated dry