Here are your parts
Parts for Maytag MEDB800VQ0 Dryer - AppliancePartsPros.com

See the attachment for the tech sheet.

First I would eliminate the vent system as a cause.
Unplug the unit and disconnect it from the vent system.
Now try a run.
If it now dries OK odds are the vent system needs checking/cleaning.
Be sure to check that the louvers on the outside of the house open correctly.

If you do not want any lint in the house.
Take a pair of pantyhose.
Put one leg into the other and then attach this to the dryer's vent.
Leave enough room so the pantyhose can balloon out like a windsock.

Both the above will let you check the temperature and the air flow.

Note: The above is not recommended for gas dryers due to carbon monoxide concerns.

If it is not the vent then try diagnostics in the tech sheet.

If OK open the unit up and check the heating coil.

Unplug the unit and both wires to the coil.
Check it with a meter, should be around 10 to 12 ohms.
Then check from each side of the coil to the case/frame, both should be infinite ohms (open).
If not the coil may have sagged or broken and is touching the case. This can cause it to run on high and the control cannot control it.