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LG DLE4870 Series - User Manual

LG DLE4870 Series
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ELECTRIC & GAS DRYER
SERVICE MANUAL
CAUTION
READ THIS MANUAL CAREFULLY IN ORDER TO
PROPERLY DIAGNOSE PROBLEMS AND TO SAFELY
PROVIDE QUALITY SERVICE ON THESE DRYERS.
U.S.A. Website: http://us.lgservice.com
Canadian Website: http://lg.ca
MODEL : DLE4870* DLG4871*
DLE4901* DLG4902*
DLE4970* DLG4971*
DLE5001* DLG5002*
DLE5070* DLG5071*

Table of Contents

Questions and Answers

  • S
    Scott JonesAug 6, 2025
    What to do if FLOW SENSE indicator shows four bars on my LG Dryer?
    • J
      Jeremy JacksonAug 6, 2025
      If the FLOW SENSE indicator shows four bars during the drying cycle on your LG dryer, this indicates restrictions in the external dryer venting, ductwork due to lint buildup or debris, or many turns/restrictions in the ductwork. Consider installing a shorter or straighter duct run. The ductwork should be checked and cleaned soon. The dryer can still be used, but drying times may be longer. Note that if exhaust restrictions are sensed by the FLOW SENSE system, the indicator will remain on for two hours after the cycle ends. Opening the door or pressing the POWER button will reset it.
  • A
    ashley90Aug 13, 2025
    What to do if my LG Dryer displays PS, PF, or nP?
    • R
      robertdelgadoAug 13, 2025
      If your LG dryer displays PS, PF, or nP, it indicates that the electric dryer power cord isn't correctly connected, or the house power supply is incorrect. It can also mean that a house fuse is blown, the circuit breaker has tripped, or there's a power outage. Check the power supply and the power cord connection to the terminal block, referring to the Connecting electric dryers section of this manual for instructions. Also, reset the circuit breaker or replace the fuse, without increasing its capacity. If there's a circuit overload, have it corrected by a qualified technician.
  • J
    Jennifer BrownAug 20, 2025
    What does tE1 or tE2 error mean on my LG Dryer?
    • T
      Tracy PriceAug 20, 2025
      The error codes tE1 or tE2 on your LG dryer indicate a temperature sensor failure.
  • J
    jjohnsonAug 28, 2025
    What does HS error mean on my LG Dryer?
    • T
      theodore10Aug 28, 2025
      The HS error code on your LG dryer indicates a humidity sensor failure.

Summary

Important Safety Notices

Grounding Device Reconnection

Instructions for securely refastening all grounding wires and straps after service.

Gas Leak Safety Procedure

Steps to follow if a gas leak is detected, including immediate evacuation and contacting authorities.

Electrostatic Discharge (ESD) Precautions

Guidelines to prevent damage to electronic components from static electricity during handling.

Specifications and Features

Product Specifications

Details on dryer dimensions, capacity, weight, power supply, and materials used in construction.

Optional Accessories

Information about available optional accessories like the dryer rack and its usage.

Installation and Setup

Dryer Rack Installation

Step-by-step guide for installing the dryer rack inside the drum.

Connecting Electric Dryers

Options for connecting electric dryers to home power supply, including 3-wire and 4-wire configurations.

Connecting the Gas Supply

Procedures for connecting the dryer to the gas supply pipe, including safety and material recommendations.

Dryer Cycle Process Overview

Component Testing Procedures

Thermal Cut-off and Thermostats

Procedures for testing thermal cut-offs and various thermostats for proper resistance and continuity.

Lamp Holder and Switches

Testing methods for the lamp holder, door switch, and idler switch for continuity and resistance.

Heater, Thermistor, and Motor

Resistance testing procedures for heater elements, thermistors, and motor components.

Gas Valve, Igniter, and Frame Detect

Testing steps for gas valve operation, igniter resistance, and frame detection components.

Outlet Thermostats (Auto;Manual Reset)

Testing procedures for auto and manual reset outlet thermostats based on temperature and resistance.

Motor Diagram and Schematic

Wiring Diagrams

Electric Dryer Wiring Diagram

Schematic illustrating the electrical connections for electric dryer components.

Gas Dryer Wiring Diagram

Schematic illustrating the electrical connections for gas dryer components.

Flow Sensor Functionality

Flow Sensor Operation Details

Details on how the Flow Sensor functions and what the display indicators mean.

Installation Test (Duct Check)

Troubleshooting Flow Sensor Issues

Diagnostic Tests

Activating Diagnostic Test Mode

Steps to put the dryer into diagnostic test mode and navigate through test sequences.

Test 1: 120 V AC Electrical Supply

Procedure to test the 120V AC electrical supply to the dryer's controller for proper voltage.

Test 2: Thermistor and Power Connection Tests

Testing thermistor resistance and power connection of tab relays for electric and gas dryer models.

Test 3: Motor Test

Procedure to test the dryer motor's resistance and check related components like the door switch and idler switch.

Test 4: Moisture Sensor Test

Steps for testing the moisture sensor's resistance and voltage output against a table of IMC values.

Test 5: Door Switch Test

Procedure to test the door switch for proper resistance when the door is open or closed.

Test 6: Heater Switch Test (Electric)

Testing the heater switch and thermostats (safety, hi-limit) for resistance in electric models.

Test 7: Gas Valve Test (Gas Type)

Testing the gas valve operation, igniter, and voltage to ensure proper heating in gas models.

Test 8: DC Pump and Motor Assembly Test

Diagnostic test for the DC pump, checking its AD value during specific test mode activations.

Gas Setting Conversion

Valve Setting for Gas Type

How to adjust the gas valve for natural gas and propane gas settings.

Orifice Change Procedure

Steps for replacing the gas orifice to match the fuel type (natural or propane).

Disassembly and Reassembly Guide

Control Panel and Top Cover Removal

Steps for disassembling the control panel, rear panels, and top cover for access.

Cabinet, Drum, and Lamp Assembly

Procedures for removing the cabinet cover, tub drum, and changing the drum lamp.

Exhaust, Filter, and Blower Housing

Instructions for dryer exhaust change, filter assembly, and blower housing disassembly.

Back Cover, Air Duct, and Rollers

Steps for removing the back cover, air duct, and drum rollers for maintenance.

Exploded Parts Diagrams

Control Panel Assembly Parts

Exploded view of the control panel and associated components with part labels.

Cabinet and Door Assembly (Electric)

Exploded diagram of the electric dryer's cabinet and door assembly, listing parts.

Cabinet and Door Assembly (Gas)

Exploded diagram of the gas dryer's cabinet and door assembly, listing parts.

Drum and Motor Assembly (Electric)

Exploded view of the electric dryer's drum and motor assembly, showing all components.

Drum and Motor Assembly (Gas)

Exploded view of the gas dryer's drum and motor assembly, showing all components.

LG DLE4870 Series Specifications

General IconGeneral
BrandLG
ModelDLE4870 Series
CategoryDryer
LanguageEnglish

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