LG LDTH797 Series User Manual (English)

Other manuals for LG LDTH797 Series

Questions and Answers:

B
Brittney BrownAug 21, 2025
How to remove spots and filming on dishes in my LG Dishwasher?
- V
  Valerie JohnsonAug 21, 2025
  Spots and filming on dishes can occur due to several reasons. Ensure you are using the recommended amount of detergent and that the rinse aid dispenser is full. If you have hard water buildup in the tub, remove all items from the dishwasher, leaving only the racks. Then, add 3 tablespoons (40 g) of citric acid powder to the main wash compartment and run the Machine Clean cycle (Download Cycle: P1) without detergent. If you cannot find citric acid powder, pour approximately one cup (200 ml - 300 ml) of white vinegar into a shallow bowl and place it in the upper rack before running the cycle.
K
Kelly GriffinAug 22, 2025
How to improve drying results in my LG LDTH797?
- J
  jamiebenjaminAug 22, 2025
  Poor drying results can occur for a few reasons. First, run the hot water tap in the sink before starting a wash cycle to ensure cool water is purged from the hot water lines. Using the High Temp. setting can also help. If you're using a rinse aid, adjust the amount to optimize performance. If washing plastic items in a Normal cycle, select the Dry Boost or Night Dry option. Finally, allow the dishwasher to completely finish the dry cycle before opening the door. Note that plastic and nonstick surfaces are harder to dry because water tends to bead rather than sheet off.
B
Barbara TownsendAug 25, 2025
How to remove cloudy, white film on dishes after washing in my LG LDTH797?
- D
  dorozcoAug 25, 2025
  The cloudy film is usually caused by minerals in the water reacting with the dishwasher detergent. First, be certain not to use too much detergent. Refer to Adding Detergent to the Dispenser section for recommended detergent amounts. You can also add an extra rinse to the cycle. If you have hard water, it may be necessary to add a performance booster that addresses the hard water condition.
J
John MartinezAug 27, 2025
What to do if my LG LDTH797 Dishwasher will not operate?
- Y
  ygonzalezAug 27, 2025
  If your dishwasher isn't operating, make sure that you have pressed the Start button and that the door is completely closed and latched. Check that the power supply or power supply line is properly connected. Also, verify that a fuse isn't blown or a circuit breaker tripped, and ensure that the Control Lock is deactivated.
K
Kerri MooreAug 28, 2025
Why is there noise during operation of my LG Dishwasher?
- W
  Whitney BrandtAug 28, 2025
  Some level of noise is normal during dishwasher operation. However, if the noise seems excessive, check that the dishwasher is level and adjust the leveling feet if needed. Also, make sure the nozzle arm isn't knocking against the dishes; if it is, reposition the dishes.
J
jamestaylorAug 29, 2025
Why does water remain in the tub of my LG LDTH797 after the cycle is complete?
- T
  Tina SandersAug 30, 2025
  If water remains in the tub after the cycle, the drain hose may be kinked or clogged. Adjust the hose to remove any kinks, or clear any blockages present.
K
Kelly WongAug 31, 2025
Why is my LG LDTH797 leaking in front?
- P
  phelpsnicholasAug 31, 2025
  Leaking in front of the appliance can be caused by the dishwasher not being leveled properly. Verify the appliance is level from side to side and from front to back. Also, check if the wrong detergent was used. If excessive sudsing is causing the leak, allow the foam to subside for 24 hours, then clean the inside of the tub with milk.
M
Melissa ValenciaSep 2, 2025
Why is the LED blinking, the machine chiming, and my LG Dishwasher won't start?
- H
  hallangelSep 2, 2025
  The door must be closed within four seconds of pressing the Start button. Open the door and either close the door and press Start (front controls) or press Start and close the door within four seconds (top controls).
C
Cheyenne PhamSep 4, 2025
Why are there spots and filming on dishes washed in my LG Dishwasher?
- J
  Joseph EdwardsSep 4, 2025
  Spots and filming can be due to low water temperature, which should be at least 120 °F for best wash performance. Avoid overloading the dishwasher and ensure dishes are loaded properly, referring to the Operation section. Insufficient water pressure, ideally between 20 and 80 psi, can also cause this issue.
R
Robert BaileySep 5, 2025
Why am I hearing a whistling sound from my LG LDTH797?
- R
  Richard PetersenSep 6, 2025
  A whistling sound can occur when water is drawn into the dishwasher. If the water pressure is too high, the sound will be louder, so it may be necessary to adjust the water valve to lower the pressure if the noise is too loud.

LG LDTH797 Series Specifications

General

Energy Star Rated	Yes
Energy Star Certified	Yes
Third Rack	Yes
Stainless Steel Tub	Yes
Type	Dishwasher
Model	LDTH797
Control Type	Electronic
Delay Start	Yes
Depth	24 5/8"
Height	33.875 inches
Width	23.875 inches

Summary

Important Safety Instructions

Warning Statements

Warnings to reduce risk of explosion, fire, death, electric shock, scalding or injury.

Grounding Instructions

Instructions for proper grounding of the dishwasher for electrical safety.

Maintenance Guidelines

Guidelines for maintaining the dishwasher to prevent injury and ensure proper function.

Caution Statements

Precautions to reduce risk of minor injury, malfunction, or product/property damage.

Product Overview

Product Features

Overview of the dishwasher's components and features, subject to change.

Product Specifications

Details on model, electrical requirements, water pressure, dimensions, and weight.

Installation

Before Installing

Preparation steps and online resources before commencing dishwasher installation.

Preparing Cabinet Opening

Instructions for preparing the cabinet opening for dishwasher installation.

Choosing Proper Location

Guidance on selecting the best location for dishwasher connections.

Water and Electrical Connections

Steps for connecting the water supply and electrical power to the dishwasher.

Routing Water Supply and Wiring

How to route the water supply line and electrical cable through designated channels.

Installing Drain Hose

Instructions for connecting the dishwasher's drain hose to disposal or waste tee.

Leveling Dishwasher

Steps to ensure the dishwasher is properly leveled for optimal operation.

Securing and Final Check

Methods for securing the dishwasher and performing final installation checks.

Operation

Before Using

Safety warnings and initial checks before operating the dishwasher.

Quick Start Guide

Step-by-step guide for a quick start to operating the dishwasher.

Control Panel Overview

Explanation of the control panel, buttons, and indicators.

Wash Cycles and Options

Description of wash cycles and available extra functions for cleaning.

Loading the Dishwasher

General guidelines for loading dishes, pans, and utensils effectively.

Loading Racks and Cutlery

Instructions for loading lower rack, upper rack, and cutlery for optimal cleaning.

Adding Cleaning Products

Guidance on adding detergent and rinse aid to the dispensers.

Rinse Aid Dispenser Adjustment

How to adjust the rinse aid dispenser level for optimal results.

Smart Functions

LG ThinQ Application

Using the LG ThinQ app to communicate with and control the dishwasher.

Smart Diagnosis Function

Using the Smart Diagnosis feature to help diagnose and solve appliance problems.

Maintenance

Cleaning and Care

Guidelines for cleaning the exterior and interior of the dishwasher.

Cleaning Filters and Spray Arms

Instructions for cleaning internal filters and spray arms for optimal performance.

Seasonal Maintenance and Storage

Guidance for maintaining and storing the dishwasher during extended periods.

Troubleshooting

Before Calling for Service

Frequently asked questions and initial checks before contacting customer support.

Error Messages

A list of error codes and their possible causes and solutions.

Operational Issues

Troubleshooting common operational problems like noise, lights, and door issues.

Performance Issues

Troubleshooting issues related to odor, food soil, cloudiness, and spots on dishes.

Wi-Fi Connectivity Issues

Troubleshooting common issues related to connecting the appliance to a Wi-Fi network.

Limited Warranty

USA Warranty Terms

Terms and conditions of the limited warranty for products sold in the USA.

Warranty Exclusions

List of exclusions from the limited warranty coverage.

Dispute Resolution Procedure

Details on arbitration, class action waivers, and dispute resolution procedures.

Canada Warranty Terms

Terms and conditions of the limited warranty for products sold in Canada.

LG LDTH797 Series User Manual

Table of Contents