LG DLE4870 Series - User Manual

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*

LG DLE4870 Series Specifications

General

Brand	LG
Model	DLE4870 Series
Category	Dryer
Language	English

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.