LG · Laundry · DLEX4000B · Owner's Manual
Yes, if the Energy Saver option is selected. The manual says this option adds an air-dry section at the beginning of the cycle, so it is normal to feel no heat at first.
Source: LG DLEX4000B Owner's Manual, extracted page 51
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Selectable options and cycle features
Your dryer includes cycle modifiers and extra options that let you adjust drying for different fabrics, load sizes, and convenience needs. Not every option works with every cycle. If you press a button for an option that is not allowed for the selected cycle, the dryer chimes twice and the setting does not change.
Before you use options
LG DLEX4000B Owner's Manual, extracted pages 39-42Troubleshooting 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.