A.O. Smith AO-WH-PRO-300 User Manual (English)

Questions and Answers:

G
Gregory RobinsonAug 14, 2025
What to do if my A.O. Smith AO-WH-PRO-300 Water Dispenser has no soft water?
- J
  jimenezchristineAug 14, 2025
  If your A.O. Smith Water Dispenser isn't producing soft water, it could be due to several reasons. First, ensure the Bypass Valve is in the Service position. Check that the appliance is plumbed correctly. If there was an extended power outage, reset the time of day and regenerate the unit. If the water hardness has increased, re-test the water and enter a new setting. Also, check for flow during water usage; if there's no flow, investigate further.
S
Samantha RichardsAug 17, 2025
Why is my A.O. Smith Water Dispenser not showing anything on the display?
- D
  Daniel WilliamsAug 17, 2025
  If there's no display on your A.O. Smith Water Dispenser, start by checking if the electric cord is plugged in and that there is electric power at the outlet, ensuring the outlet isn't controlled by a switch. If those are fine, test the transformer with a voltmeter for 12 VAC at the control; if it's less than 10 VAC, replace the transformer. If 12 VAC is present, the circuit board may be defective, and you should replace the controller.
N
Nancy SmithAug 20, 2025
What to do if my A.O. Smith Water Dispenser is indicating flow when water is not being used?
- C
  cpriceAug 20, 2025
  If your A.O. Smith Water Dispenser shows flow even when no water is being used, it's likely that your household plumbing system has a leak. Repairing the leak should resolve this issue.
M
Matthew WardAug 25, 2025
How to fix A.O. Smith AO-WH-PRO-300 Water Dispenser staying in regeneration?
- O
  owenscottAug 25, 2025
  If your A.O. Smith Water Dispenser remains in regeneration, ensure the controller is fully pushed onto the cover plate. A defective magnet disk can cause this, so consider replacing it. Check for any foreign objects in the main control valve and remove them. If the valve assembly is broken and the motor is running, repair the valve assembly.
M
Michael BlakeAug 31, 2025
What does error E1 mean on A.O. Smith AO-WH-PRO-300 Water Dispenser?
- J
  Jill BarnettAug 31, 2025
  If your A.O. Smith Water Dispenser displays an “E1” error, which means 'Home not found', cycle the power by unplugging the transformer and plugging it back in to restart the search for Home. Also, ensure the controller is pushed all the way onto the cover plate.
P
paynemarySep 3, 2025
What to do if my A.O. Smith AO-WH-PRO-300 Water Dispenser has excess water in the brine tank?
- A
  Amanda KnightSep 3, 2025
  If there's excess water in the brine tank of your A.O. Smith Water Dispenser, check for a restricted, frozen, or pinched drain line; remove any restrictions, thaw if frozen, or straighten if pinched. Also, inspect the brine line, brine line flow control, or air check/draw tube for blockages; clean the flow control, air check/draw tube, and brine line, removing any sediment from the brine cabinet. A plugged injector assembly can also cause this, so clean or replace the injector, replacing the entire assembly if the throat is removed.
M
Michael WhiteSep 6, 2025
Why is my A.O. Smith Water Dispenser not indicating flow when water is flowing?
- C
  Cheryl MaySep 6, 2025
  If your A.O. Smith Water Dispenser isn't indicating flow even when water is running, first ensure that the Bypass Valve is in the Service position. Also, check that the appliance is plumbed correctly. If those aren't the issue, the sensor may not be receiving a signal from the magnet on the turbine; remove the sensor from the bypass housing and test it with a magnet on either flat side. If flow is indicated during the test, check the turbine; if not, replace the sensor. Finally, a jammed turbine can cause this, so remove the Bypass Valve and clear any debris from the turbine.

A.O. Smith AO-WH-PRO-300 Specifications

General

Brand	A.O. Smith
Model	AO-WH-PRO-300
Category	Water Dispenser
Language	English

Summary

Water Softener Overview and Initial Setup

Water Softener Box Contents

Lists all components included in the water softener package for installation verification.

Before You Begin Water Softener Setup

Details essential pre-installation steps, including water testing for hardness and pH.

Understanding Ferrous Iron and Compensated Hardness

Explains how to measure and account for ferrous iron in water for accurate softener settings.

Maximizing Water Softener Efficiency

Provides tips on salt level, regeneration timing, and handling water supply conditions for optimal performance.

General Precautions for Water Softener Use

Outlines essential safety measures and installation considerations to prevent damage or hazards.

Water Softener Components and Valve Operation

Getting to Know Your A. O. Smith Water Softener

Identifies and explains the main components of the water softener unit.

Water Softener Valve Overview and Operation

Details the functions of the bypass valve, including bypass and service positions.

Installation and System Configuration

Water Softener System Configuration Diagram

Illustrates the recommended plumbing configuration and connections for the water softener.

Water Softener Installation Guide

Step-by-step instructions for preparing the appliance, placement area, and connecting water lines.

Connecting the Gravity Overflow Line

Instructions for properly connecting the overflow line to a suitable drain, ensuring safety.

Connecting the Drain Line

Guidance on routing and connecting the drain line for backwash water discharge.

Flushing Lines and Checking for Leaks

Procedures for flushing the system and verifying all connections are leak-free after installation.

Plugging in the Transformer and Controller

Instructions for connecting the power supply and ensuring the controller is properly powered.

Controller Programming and Initial Operation

Setting the Water Softener Controller

Guide to navigating the controller menu and setting water hardness, time, and regeneration parameters.

Adding Water to the Brine Cabinet

Instructions for adding the initial amount of water to the brine cabinet for startup.

Filling the Brine Cabinet with Salt

Guidance on adding salt to the brine cabinet, including salt type recommendations.

Completing the Water Softener Installation

Final steps including flushing the system, checking water flow, and placing the cover.

Troubleshooting, Efficiency, and Specifications

Troubleshooting Common Water Softener Issues

A guide to identifying and resolving common problems encountered with the water softener.

Water Softener Efficiency Statements

Details the efficiency ratings and performance criteria according to NSF/ANSI 44.

Water Softener Specifications and Ratings

Details the technical specifications, performance ratings, and reduction capabilities of the softener.

Warranty Information

Limited Warranty Coverage Details

Explains what is covered, not covered, and the duration of the limited warranty.

Warranty Registration and Service

Information on how to register the warranty and obtain service under its terms.

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