LG · Laundry · DLEX4000B · Owner's Manual
How do I start Smart Diagnosis on this dryer?
Open the LG ThinQ app, select Smart Diagnosis in the menu, and follow the instructions in the app.
Source: LG DLEX4000B Owner's Manual, extracted page 46
LG · Laundry · DLEX4000B · Owner's Manual
Open the LG ThinQ app, select Smart Diagnosis in the menu, and follow the instructions in the app.
Source: LG DLEX4000B Owner's Manual, extracted page 46
Source integrity
This answer stays tied to reviewed answer status, cited manual sections, the source manual, original source URL, text export, and JSON catalogs.
Reviewed answers are eligible for public indexing and structured Q&A output.
The answer resolves back to a source manual record when one is attached.
Cited manual sections are preserved for page-level evidence and verification.
The source manual keeps its manufacturer or source-host URL attached.
The source manual text is available as a public plain-text export.
The source manual has a machine-readable catalog with sections, questions, and coverage.
Continue from this answer into the manual evidence, model hub, source download, codes, guides, and parts.
Read the manual text that supports this answer, with page context and source citations preserved.
Continue to the full model page for manuals, answers, codes, troubleshooting, symptoms, and parts.
Open the source manual, coverage map, topic index, extracted text, and source/download record.
Check model-specific error-code pages when the answer mentions a display code, light pattern, or diagnostic state.
Use troubleshooting guides when the answer needs a sequence of checks rather than a single manual fact.
Check model-linked part references for filters, racks, panels, diagrams, and maintenance-related components.
Use this sequence to verify the answer against the manual source and continue into the right support path.
Start with the reviewed answer, then use the linked evidence and source trail before acting on the appliance.
Confirm the answer against the extracted manual section and citation.
Use the full manual, read-online text, and download page when the answer depends on page context or safety notes.
Use the model hub for related answers, codes, guides, symptoms, and parts tied to the same appliance.
LG ThinQ smart features
The LG ThinQ app lets you communicate with the dryer using a smartphone. With the app, you can use several smart features, including downloaded cycles, settings, energy monitoring, remote control, push messages, and Smart Diagnosis.
What LG ThinQ can do
LG DLEX4000B Owner's Manual, extracted pages 43-45Smart Diagnosis
Smart Diagnosis can be used with the LG ThinQ app to help identify appliance issues.
Before you start - Open the LG ThinQ application. - Select Smart Diagnosis from the menu. - Follow the instructions shown in the app.
LG DLEX4000B Owner's Manual, extracted page 46This answer is only published when it has a reviewed answer status and a source citation back to the manual text.