The LG F1480RD(1~9) 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 while the machine is in use.
Water overfills due to a faulty water valve.
The water level sensor is not functioning correctly.
The motor is overloaded.
The washer experienced a power failure.
Water does not enter washer or enters slowly.
Water in the washer does not drain or drains slowly.
Rattling or clanking noise during operation.
Excessive vibration during operation.
Child lock is activated, locking all buttons except the Power button.