LG Dishwasher LDS4821ST Owners Manual

The LG Dishwasher LDS4821ST is a 24-inch built-in dishwasher featuring TrueSteam technology, QuadWash system with multi-motion arms, LoDecibel quiet operation, EasyRack Plus adjustable upper rack, SmartThinQ technology for Wi-Fi connectivity, LED display, stainless steel interior, multiple wash cycles, and energy-efficient performance. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Loading and Operation 7. Wash Cycles and Options 8. Care & Maintenance 9. SmartThinQ Features 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: QuadWash system, TrueSteam technology, EasyRack Plus adjustable racks, LED control panel, stainless steel tub, SmartThinQ connectivity.

Feature	Description
QuadWash System	Four multi-motion arms for thorough cleaning
TrueSteam Technology	Steam cleaning for sanitization and stain removal
EasyRack Plus	Adjustable upper rack with fold-down tines
LoDecibel Operation	Quiet performance at 44 dBA
SmartThinQ	Wi-Fi connectivity for remote control and monitoring
LED Display	Digital display with cycle progress indicators
Stainless Steel Interior	Durable and resistant to stains and odors
Third Rack	Additional rack for utensils and small items
Power Scrub Zone	Intensive cleaning for pots and pans
Soil Sensor	Automatically adjusts cycle based on soil level

Installation

Unpack and inspect contents. Ensure proper electrical and plumbing connections.

Remove shipping materials: Remove all tape and protective coverings.
Level the dishwasher: Adjust leveling legs to ensure proper door closure.
Connect water supply: Attach hot water line to water inlet valve.
Connect drain hose: Route drain hose to garbage disposal or sink drain.
Electrical connection: Connect to dedicated 120V, 15-amp circuit.
Secure to countertop: Attach mounting brackets to underside of counter.

WARNING! Ensure water and electrical connections are properly installed by qualified technician. Do not use extension cord.

First-Time Setup

Before first use, run a complete cycle with dishwasher empty.

Remove all packaging materials from interior.
Load dishwasher detergent into dispenser.
Select Normal cycle and press Start.
Set up SmartThinQ: Download app and connect to Wi-Fi network.
Adjust rack positions as needed for your dishware.
Familiarize yourself with control panel and settings.

CAUTION! Use only dishwasher detergents. Do not use regular dish soap.

Specifications

Dimensions: 24 inches wide, 34.5 inches high, 24 inches deep
Capacity: 14 place settings
Noise Level: 44 dBA
Water Consumption: 2.9 gallons per cycle (Normal wash)
Energy Consumption: 0.87 kWh per cycle (Normal wash)
Water Pressure: 20-120 psi required
Electrical: 120V, 60Hz, 15 amp dedicated circuit
Wash System: QuadWash with 4 multi-motion arms
Racks: 3 racks including EasyRack Plus upper rack
Finish: Stainless steel exterior and interior

Controls and Settings

Control Panel: Power button, Cycle selection buttons, Options buttons, Start/Pause button, Delay Start, Child Lock.

Cycle Selection: Heavy, Normal, Light, Rinse Only, Speed Wash, Steam Clean, Sanitize, Crystal/Glass.

Options: Heat Dry, Extra Dry, Hi-Temp Wash, Sani Rinse, Delay Start, Lock Controls.

Smart Features: Remote Start, Cycle Monitoring, Notifications, Diagnostics via SmartThinQ app.

Loading and Operation

Proper loading ensures optimal cleaning performance.

Scrape off large food particles before loading.
Load lower rack with plates, pots, and pans facing center.
Adjust upper rack height for tall items in lower rack.
Use third rack for utensils and small items.
Add detergent to dispenser (powder, gel, or pods).
Select desired cycle and options.
Close door firmly and press Start.

Tip: Do not overload racks. Ensure spray arms can rotate freely.

Wash Cycles and Options

Choose appropriate cycle based on soil level and dish type.

Cycle	Duration	Best For
Heavy	150 min	Pots, pans, heavily soiled dishes
Normal	120 min	Everyday dishes, moderate soil
Light	90 min	Lightly soiled dishes, quick clean
Speed Wash	60 min	Light soil, time-saving
Steam Clean	140 min	Sanitizing, stuck-on food
Rinse Only	15 min	Rinsing dishes until full load
Crystal/Glass	95 min	Delicate glassware, crystal

Care & Maintenance

Regular maintenance ensures optimal performance and longevity.

Clean filter monthly: Remove and rinse under running water.
Wipe door gasket: Clean with damp cloth to maintain seal.
Clean spray arms: Check for debris and clean holes.
Run cleaning cycle: Use affresh cleaner monthly.
Check drain hose: Ensure no kinks or clogs.
Wipe control panel: Use soft, damp cloth only.

CAUTION! Unplug dishwasher before performing any maintenance. Do not use abrasive cleaners.

SmartThinQ Features

Connect to Wi-Fi for enhanced functionality through SmartThinQ app.

Remote Start: Start cycles from anywhere
Cycle Monitoring: Track cycle progress remotely
Notifications: Receive alerts when cycle completes
Diagnostics: Troubleshoot issues through app
Software Updates: Receive latest features automatically
Energy Monitoring: Track energy and water usage

Download SmartThinQ app from App Store or Google Play.

Regulatory Information

UL Listed: Complies with UL 749 standards. Energy Star Certified: Meets ENERGY STAR requirements for energy efficiency. FCC Part 15: Class B digital device. California Proposition 65 Warning. For support, visit www.lg.com or contact 1-800-243-0000. Model: LDS4821ST. Serial number located on inner door frame.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Dishwasher won't start	Door not closed properly	Ensure door is firmly closed; check child lock
Poor cleaning results	Spray arm obstruction	Check and clean spray arms; ensure proper loading
Water not draining	Drain hose clogged	Check drain hose for kinks; clean filter
Leaking water	Door seal damaged	Check door gasket; ensure proper leveling
Unusual noise	Foreign objects in pump	Check for objects in filter and spray arms
Error codes displayed	Various system issues	Refer to error code chart in manual; reset unit

Reset: Press and hold Start button for 3 seconds to reset control panel.

Service: 1-800-243-0000; www.lg.com