LG · Laundry · DLEX4000B · Owner's Manual
Possible causes listed are a blown house fuse, a tripped circuit breaker, a power outage, the gas supply or dryer shutoff valves being off, or the Energy Saver option being selected. Make sure the gas shutoffs are fully open, and if using the Normal cycle, deselect Energy Saver.
Source: LG DLEX4000B Owner's Manual, extracted page 51
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Final installation checks and test run
Before using the dryer normally, make three final checks: levelness, airflow, and the installation test.
1) Check that the dryer is level Once the dryer is in its final location, recheck it to make sure it is level: - front to back - side to side - all four leveling feet should be in firm contact with the floor
LG DLEX4000B Owner's Manual, extracted pages 28-30Troubleshooting by symptom: power and heating
Use these checks when the dryer will not start, will not heat, or is drying much more slowly than expected. Only the causes and fixes listed here are supported by the manual.
The appliance will not turn on
LG DLEX4000B Owner's Manual, extracted page 51This answer is only published when it has a reviewed answer status and a source citation back to the manual text.