My LG dryer will not power up

Disconnect from power source by turning off breaker or disconnect plug.

Press START/STOP button several times. Reconnect power.

Check power at dryer electrical outlet with DMM if possible.

If your breakers are old. I'll start by replacing the breaker to the dryer at the box. It is a common failure. Breakers wear out to. Check the power cord for any burnt markings and look at the outlet as well for burnt or discolor contacts. This will overheat as well causing the breaker to exceed the limit and trip it.

Check to power at outlet for 220 volts

Check the breaker for the correct amperage cut off.

If the unit had an obstruction in the air flow, it would not trip the breaker.

Try running the unit with just cool air and see if it trips the breaker.

Odds are, you have a defective breaker.
Also, if the home is newly built, check the panel for loose connections at the breaker.
Or you could try a different power outlet, like the hot water heater.

If the unit continues to trip breakers on other outlets, you may have a short in unit.

This could be a bad breaker or a loose connection in the dryer plug/outlet. If the dryer just will not work at all and there is voltage at the dryer's outlet, then the dryer is defective. I would then suspect the motor as the culprit.

Check house fuses or circuit breaker.
Ck. power cord and power outlet for signs of arching an replace if needed.
Ck. power cord at dryer side and make sure the ends are not burnt. Unplugged of course.

If all is ok call for service.

If you move the cord @ the outlet and the dryer shuts off replace outlet if the prongs on the cord are not damaged.

If you wiggle at the dryer side and it shuts off un plug the dryer remove acess cover and inspect end of cord. Ck. and make sure terminal nuts are tight. and not burnt due to a loose connection.

Your circuit breaker may be bad. Run dryer and if breaker gets hot after 10min or so the breaker is bad.
Higher heat settings draw more amperage thus tripping the bad or undersized breaker. 30 amp 2 pole breaker required.
Ck. the power cord for signs of arching. Replace power cord or outlet if damaged.

Check the breaker in your home's breaker box. The dryer will be the only thing that is on it. It will be a double breaker and looking might not tell you if it has tripped. If it isn't marked just grab the swich and see if it's "wiggly" on each double breaker. If you find a wiggler, flip it all the way over to "off" then back to "on". If the breakers are all fine, the next place to check is the wall outlet itself. If you have a volt meter, first check the slots in the outlet. If you get nothing, pull the wall plate off of the outlet and check the wires leading to the outlet. If they have power, replace the outlet. To the best of my somewhat experienced knowledge, there is no fuse in dryer and I know there is no breaker in it.

Need a voltmeter that can check for ~220 volt AC across the two slanted contacts in the wall mounted power outlet for the dryer power cord. If present, then problem is within the dryer case--probably an open heating element. If not present, check the house electrical panel to see if the twin breakers have tripped. I so, push handles OFF then ON. If trying the dryer again, and it quits heating, it probably tripped the breakers again which means that the heating element is shorted inside the case.

check the door switch or the actuator for the door switch. hope this helps.