The LG WF-7806WRD Dryer has some known problems that occur often. Here are some easy to do solutions for the problems or error codes your LG might be giving you.
The door is locked for safety reasons while the machine is in use.
All buttons are locked except the Power button to prevent tampering.
Water does not enter the detergent drawer, possibly due to a clogged water inlet filter.
The washer has experienced a power failure.
Overload in motor detected.
Water overfills due to a faulty water valve.
The water level sensor has malfunctioned.
Noise detected during operation, usually due to loose items.
The washer is vibrating excessively during operation.
Water leakage detected during use.