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LG WH20S F5 - User Manual

LG WH20S F5
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www.lg.com
OWNER’S MANUAL
HEAT PUMP
WATER HEATER
Copyright © 2020 LG Electronics Inc. All Rights Reserved.
Original instruction
MFL71409202
Rev.02_112320
EN ENGLISH FR FRANÇAIS
DE DEUSTSCH IT ITALIANO
ES ESPAÑOL
PL POLSKI
Read this owner’s manual thoroughly before operating the
appliance and keep it handy for reference at all times.

Table of Contents

Questions and Answers

  • J
    Joann LopezJul 29, 2025
    What to do if my LG WH20S F5 has insufficient or no hot water?
    • C
      Claudia RodriguezJul 29, 2025
      If you're experiencing insufficient or no hot water with your LG Heat Pump, several factors could be the cause. First, check if your water usage has exceeded the heater's capacity; if so, wait for it to recover. Ensure that all faucets are closed and inspect your home for leaks in the plumbing system. Repair any leaks you find. Also, check if a fuse is open or a circuit breaker has tripped, and replace the fuse or reset the breaker if necessary.
  • D
    David CurryAug 11, 2025
    Why is my LG WH20S F5 Heat Pump not producing enough hot water?
    • S
      Sabrina BrownAug 12, 2025
      If your LG Heat Pump isn't producing enough hot water, the cold water inlet temperature may be lower, especially in winter, which is normal and means it will take longer to heat. Also, ensure the water connections to the unit are correctly installed and not reversed. Re-install if necessary.

Summary

Safety Instructions

Safety Precaution

General safety advice and warnings for appliance operation and user safety.

Water Temperature Setting

Guidance on setting water temperature to prevent scalding and ensure safe operation.

Installation

Parts and Functions

Installation Instructions

Step-by-step guide for physically installing the water heater and its connections.

Select the best Location

Criteria and recommendations for choosing an optimal installation site for the water heater.

Unpacking and Removing Shipping Bolts

Installing Drain Valve

Installing T&P Relief Valve

Connecting T&P Relief Valve Discharge Pipe

Installing Condensate Drain Lines

Connecting the Water Supply

Instructions for connecting the cold and hot water supply lines to the unit.

Making Electrical Connections

Detailed guide for safely connecting the electrical power supply to the water heater.

Safety Controls

Information on the built-in safety features like the temperature limiting control (ECO).

Installation Checklist

Operation

Using Basic Control

Water Temperature Adjustment

Operation Modes

Maintenance

Draining and Flushing the Water Heater

Troubleshooting

Before Calling for Service

Initial checks and common solutions before contacting a service center for assistance.

Common Issues and Solutions

Error Code List

A detailed list of error codes, their meanings, and corrective actions.

LG WH20S F5 Specifications

General IconGeneral
BrandLG
ModelWH20S F5
CategoryHeat Pump
LanguageEnglish

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