Brand:
LG
Category: Home Appliance
Document Type: Manual
Language: EN
Manual for DLEX3900*
Uploaded: Nov. 21, 2025, 6:28 p.m.
Manual Publish Date: 2018-05-01
Warranty Information
Copyright © 2018 LG Electronics Inc. All rights reserved. Only training and service purposes.
Dryer Operation Summary
Sensor Dry Cycles:
These cycles use sensors to detect moisture and automatically stop when clothes are dry. Options include Steam Fresh™, Steam Sanitary™, Bedding, Heavy Duty, Perm.Press, Normal, Delicates, Sportswear, Antibacterial, and Towels.
Manual Dry Cycles:
These cycles allow manual control over drying time and temperature. Options include Speed Dry and Air Dry (no heat).
Key Features:
- Wrinkle Care: Helps reduce wrinkles by tumbling clothes periodically after the cycle ends.
- Energy Saver: Optimizes energy use.
- Control Lock: Prevents accidental changes to settings.
- Interior Light: Illuminates the drum.
- Reversible Door: Allows for flexible installation.
Troubleshooting and error codes
| Component | Test Procedure | Check result | Remark |
| 1. Thermal cut off | Measure resistance of terminal to terminal | ① Open at 284 ± 9°F (140 ± 5°C) ② Auto reset -31°F (-35°C) |
• Heater case-Safety • Electric type |
| 2. Hi limit Thermostat (Auto reset) | Measure resistance of terminal to terminal | ① Open at 257 ± 9°F (125 ± 5°C) ② Close at 201 ± 9°F (94 ± 7°C) |
• Heater case - Hi limit • Electric type |
| 3. Outlet Thermostat (Cut off) | Measure resistance of terminal to terminal | ① Open at 185 ± 9°F (85 ±5°C) | • Blower housing - Safety |
| 4. LED Lamp | Schematic: | If the lamp is turned on by connecting is normal. | It is not measured by multimeter because Vth is 3.2V |
| 5. Door switch | Measure resistance of the following terminal 1) Door open 2) Door closed |
1 Resistance value < 1Ω 2 Resistance value≒∞ ① Resistance value ≒∞ ② Resistance value < 1Ω |
|
| 6. Idler switch | Measure resistance of the following terminal: COM - NC | 1.Lever open 1 Resistance value < 1Ω 2. Lever push (close) ② Resistance value ≒∞ |
|
| 7. Heater | Measure resistance of the following terminal ① Terminal: 1 (COM) - 2 ② Terminal: 1 (COM) - 3 ③ Terminal: 2 - 3 |
① Resistance value: 10Ω ② Resistance value: 10Ω ③ Resistance value: 20Ω |
• Electric type |
| 8. Thermistor | Measure resistance of terminal to terminal Temperature condition: 58°F ~ 104°F (10~40°C) |
Resistance value: 10Ω | • Heater case Hi limit • Electric type |
| 9. Motor | See Page 15 | ||
| 10. Gas valve | Measure resistance of the following terminal 1 Valve 1 terminal 2 Valve 2 terminal |
① Resistance value 1.5k~2.5KΩ ② Resistance value 1.5k~2.5KΩ |
• Gas type |
| 11. Igniter 5318EL3001 | Measure resistance from terminal to terminal. | Resistance value 50~800 Ω (for 5318EL3001) | • Gas type |
| 12. Flame Detect | Measure resistance of terminal to terminal ① Open at 370°F (Maximum) ② Close at 320°F |
① Resistance value ≒∞ ② Resistance value < 1Ω |
• Gas type |
| 13. Outlet Thermostat (Auto reset) | Measure resistance of terminal to terminal ① Open at 203 ± 41°F (95±5°C) ② Close at 159 ± 41°F (70±5°C) |
① Resistance value ≒∞ ② Continuity < 1Ω |
• Gas type • Gas funnel |
| 14. Outlet Thermostat (Manual reset) | Measure resistance of terminal to terminal ① Open at 230 ± 41°F (110 ± 5°C) ② Manual reset |
Resistance value ≒∞ ② Continuity < 1Ω |
• Gas type • Gas funnel |
| 15. Inlet. valve | Measure resistance of the Following terminal - Left picture -.plate | DC 12V Limit current: 550mA Coil resist: 240±10% |
Electric type |