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Replacement parts for WHIRLPOOL LER3624EQ1 | AppliancePartsPros.com

If you have to wait several minutes before you can restart it then it is probably the motor overheating. It then trips it's internal thermal protect.
You have to wait till the motor cools down and the thermal protect resets before you can restart.

Try manually turning the drum in the correct direction. It should turn fairly easily.
If not it may be overloading the motor.
You may want to try this on a couple other dryers to get a feel for it.
If it is hard to turn run your fingers along the back and front edges of the drum just to ensure something has no gotten jammed in there. Be careful in case it is a sharp object. If nothing is there you will have to open it up and find out what is causing excessive drag on the drum.

Check/clean your vent system. Could be a partial clog is forcing hot air back onto the motor. May be the blower seal (Item 16 in Section 3) is shot.

Could just be that the interior of the machine is clogged with lint.

If all OK then odds are that your motor is on it's last legs.