A.O. Smith GPS-75 - User Manual

Other manuals for A.O. Smith GPS-75

Owner's Manual20 pages

Questions and Answers

C
Christopher PadillaAug 22, 2025
What to do if A.O. Smith GPS-75 is leaking?
- G
  george52Aug 22, 2025
  If your A.O. Smith Water Heater is leaking, turn off the heater and water supply immediately and repair any improperly sealed connections at the hot or cold supply, relief valve, drain valve, or thermostat threads. Also, inspect other appliances and water lines near the water heater for leaks. Condensation of flue products can also cause leaks; refer to the section on condensation for more information.
M
Monica BradyAug 25, 2025
How to stop a leaking T&P valve on A.O. Smith GPS-75?
- T
  Thomas CareyAug 25, 2025
  A leaking Temperature and Pressure (T&P) valve on your A.O. Smith Water Heater is often due to thermal expansion in a closed water system. To resolve this, install a thermal expansion tank. Important: Do not plug the T&P valve. Also, check the relief valve for proper operation, ensuring again that you do not plug the T&P valve.
D
Danny SanchezAug 27, 2025
How to fix A.O. Smith GPS-75 Water Heater with open ignitor circuit?
- L
  Leon MurphyAug 27, 2025
  If the Intelli-Vent™ control in your A.O. Smith Water Heater detects an open ignitor circuit, check the wiring to the hot surface ignitor. Replace the ignitor assembly if the wiring is damaged or worn.
S
Seth LopezAug 29, 2025
What to do if temperature adjust buttons are stuck on A.O. Smith GPS-75?
- R
  Rebecca MyersAug 29, 2025
  If the self-diagnostic check on your A.O. Smith Water Heater detects that one or both of the temperature adjust buttons are stuck: 1. Press and release the temperature adjust buttons. If this action doesn't clear the error, the control will continue to regulate water temperature at the last setting. However, settings will no longer be adjustable, and the control should be replaced.
J
Jonathan SmithAug 31, 2025
How to fix reversed polarity in A.O. Smith GPS-75 Water Heater?
- E
  Elizabeth RochaAug 31, 2025
  If the power supply to the Intelli-Vent™ control in your A.O. Smith Water Heater has reversed polarity: 1. Ensure the wall outlet is properly wired. 2. Ensure all internal 120 VAC wiring connections and wiring harness have no reversed wires. The 120 VAC “hot” wire must connect to the on/off switch.
A
Andrew AtkinsonSep 2, 2025
Why does my A.O. Smith GPS-75 Water Heater have a yellow flame?
- J
  James RaySep 2, 2025
  A yellow flame in your A.O. Smith Water Heater can be caused by a few issues. First, turn off the heater and gas, then clean the burner head to remove any dirt in the burner ports. Also, check for any restrictions in the combustion air path and clear the area around and under the heater of any debris. Insufficient room air for proper combustion can also cause a yellow flame; refer to the installation manual for required opening sizes.
D
David CampbellSep 4, 2025
What causes A.O. Smith Water Heater vent pipe to be too hot?
- J
  Jennifer BradfordSep 4, 2025
  If the vent pipe of your A.O. Smith Water Heater is too hot (above 170° F), it could be due to several reasons. If the blower isn't running when the heater is fired, take the unit out of service immediately and call an authorized service representative. Not enough dilution air mixing with flue gases or room air being too hot for mixing with flue gases can also cause this issue. Ensure proper air circulation and that the room air used for dilution is less than 90°F. Finally, a wrong burner orifice can cause the vent pipe to overheat; ensure the correct orifice is installed.
A
amanda39Sep 6, 2025
Why does my A.O. Smith Water Heater have hot water odors or color?
- D
  Derek AndersonSep 6, 2025
  Hot water odors or discoloration in your A.O. Smith Water Heater can be caused by high sulfate or mineral content in the water supply, or by iron or sulfate-reducing bacteria. To address this, drain and flush the heater thoroughly. Then, chlorinate, refill, and flush again. Finally, chlorinate the water supply.
M
Megan HallSep 10, 2025
What to do if A.O. Smith GPS-75 temperature exceeds 195°F?
- V
  Veronica AllenSep 10, 2025
  If the water temperature in your A.O. Smith Water Heater tank exceeds 195°F (91°C) and activates the ECO, try the following: 1. Turn the power off for 10-20 seconds, then turn it back on to clear the error code. 2. If the error code persists, replace the Intelli-Vent™.
M
Mark PerkinsSep 12, 2025
What to do if A.O. Smith GPS-75 pressure switch circuit remains closed?
- C
  courtney96Sep 12, 2025
  If the pressure switch circuit on your A.O. Smith Water Heater remains closed for more than 5 seconds after the heating cycle begins, follow these steps: 1. Check that the air pressure switch circuit wiring is correct and the air pressure switch is not jumpered. 2. After securing power to the water heater, check the continuity of the air pressure switch contacts with the wires disconnected. * If the pressure switch contacts show continuity (closed circuit), replace the pressure switch. * If the pressure switch contacts are open and all wiring is correct, turn the power off for 10-20 seconds, then on again to clear the error code. If the error code persists, replace the Intelli-Vent™ control.

Summary

General Safety and Emergency Procedures

Gas Leak Detection and Response Protocols

Detailed steps for identifying and responding to gas leaks.

Essential Safety Warnings and Manual Retention

Key safety alerts and instructions for keeping the manual.

Safe Installation, Use, and Service Overview

Understanding Safety Symbols and Key Definitions

Explanation of DANGER, WARNING, CAUTION symbols and important roles.

General Safety Precautions

Fire, Explosion, and Scald Hazard Warnings

Critical warnings regarding fire, explosion, and scalding risks.

Additional Safety Guidelines

Flammable Vapors and Carbon Monoxide Hazards

Risks associated with flammable liquids and CO gas.

Introduction and Installation Preparation

Preparing for Water Heater Installation

Key steps and considerations before installing the water heater.

Specific Installation Requirements (Massachusetts)

Carbon Monoxide Detectors and Signage Rules

State-specific mandates for CO detectors and warning signs.

Typical Water Heater Installation Overview

Component Identification and Control Panel

Diagrams of water heater parts and thermostat controls.

Water Piping and Mixing Valve Usage

Scald Prevention with Mixing Valves

Using mixing valves to prevent hot water scalds.

Locating the New Water Heater

Location Considerations and Drainage Requirements

Guidelines for selecting a safe and accessible installation location.

Flammable Material Risks in Installation Areas

Safety precautions for areas with flammable liquids or vapors.

Combustion Air and Ventilation Requirements

Clearances, Insulation, and CO Hazards

Safety rules for vent clearances, insulation blankets, and CO risks.

Ventilation for Confined and Unconfined Spaces

Requirements for air supply based on installation space type.

Ventilation Air Intake Methods

Indoor and Outdoor Air Supply Options

Methods and diagrams for providing ventilation air.

New Water Heater Installation: Chemical and Water Piping

Chemical Vapor Corrosion Risks and Water Piping

Impact of chemicals on vent systems and water pipe connections.

Thermal Expansion and Toxic Chemical Hazards

Risks of pressure buildup and contamination from chemicals.

Temperature-Pressure Relief Valve and Piping

T&P Valve Requirements and Explosion Hazards

Safety and installation rules for the relief valve.

Discharge Pipe Safety and Water Damage Prevention

Guidelines for the relief valve discharge pipe to prevent damage.

Gas Piping and High Altitude Adjustments

Gas Piping Safety and Leak Testing

Procedures for safe gas line installation and leak checks.

High Altitude Orifice and CO Warnings

Adjustments for high altitude and carbon monoxide risks.

Sediment Traps, Filling, and Venting Basics

Sediment Trap Installation and Gas Safety

Importance of sediment traps to prevent gas system contamination.

Filling the Water Heater and Venting Overview

Procedure for filling the tank and general vent system setup.

Vent System Clearances and Planning

U.S. Horizontal Vent Clearances

Diagrams showing minimum distances for horizontal vent terminals.

Vent System Planning and Pipe Sizing

Guidance on designing the vent route and selecting pipe size.

Vent Pipe Materials and Condensate Management

Approved Vent Pipe Materials and Installation

Specifications for PVC, CPVC, and ABS vent pipes.

Condensate Handling and Blower Assembly Checks

Managing vent system condensation and blower connections.

Sidewall Vent Terminal Installation

Vent Terminal Installation Procedure and Diagrams

Step-by-step guide for installing the vent terminal through a wall.

Power Vent Wiring Schematic and Safety

Wiring Diagrams and Electrical Safety Precautions

Electrical connection diagrams and essential safety measures.

Vent System Installation Completion

Sidewall and Vertical Vent System Installation

Final steps for installing sidewall or vertical vent systems.

Vent Termination Clearances and Requirements

Critical distances for vent outlets to ensure safety.

Vent Pipe Preparation and Materials

Initial Preparation and Material Selection

Steps for preparing PVC/CPVC pipes and selecting materials.

Primer and Cement Application Guidelines

Safe and correct application of primer and solvent cement.

Vent Pipe Joint Assembly and Cleanup

Pipe Deburring, Dry Fitting, and Cement Application

Preparing pipe ends and applying cement for strong joints.

Joint Assembly and Cleanup Procedures

Steps for assembling pipes and cleaning excess cement.

Operating Instructions and Safety Checks

Pre-Operation Safety Checks and Gas Leak Procedures

Essential checks before operation and actions for gas detection.

Water Heater Operation and Temperature Setting

Step-by-step guide for starting and adjusting the water heater.

Temperature Regulation and Scald Prevention

Adjusting Water Temperature and Scald Hazard Risks

How to set temperature and minimize scald risks.

Temperature Indicators and Adjustment Controls

Understanding the water heater's temperature display and buttons.

Important Operational Information

Startup Conditions: Smoke, Odor, Thermal Expansion, Sounds

Notes on initial operation, including smoke, odor, and noises.

Operational Problems: Smelly Water and Hydrogen Gas

Troubleshooting common issues like smelly water and hydrogen gas.

Periodic Maintenance and Housekeeping

Venting System and Burner Inspection

Procedures for inspecting the vent system and burner assembly.

Burner Cleaning and General Unit Upkeep

Steps for cleaning the burner and maintaining the unit's exterior.

Anode Rod, Relief Valve, and Draining Procedures

Anode Rod Inspection and Replacement

Maintenance of the anode rod for tank protection.

Relief Valve Operation and Tank Draining

Testing the relief valve and emptying the water heater tank.

Water Heater Service and Leakage Checks

Service Guidelines and Identifying Water Leaks

General service advice and methods for detecting water leaks.

Repair Parts List and Ordering

Component Identification for Parts Ordering

A diagram and list of water heater components for ordering parts.

Troubleshooting with Intelli-Vent Control System

Intelli-Vent LED Status Codes and Troubleshooting

Diagnosing issues using LED status codes on the control system.

Intelli-Vent Control Troubleshooting (Continued)

Intelli-Vent Error Codes and Resolution Steps

Further troubleshooting for the Intelli-Vent control system error codes.

General Troubleshooting Guide

Common Water Heater Problems and Solutions

A comprehensive list of common issues and their solutions.

Limited Residential Gas Warranty

Warranty Terms, Conditions, and Responsibilities

Details on warranty coverage, exclusions, and owner obligations.

Claim Process and Important Information

Steps for filing a warranty claim and required documentation.

A.O. Smith GPS-75 Specifications

General

Brand	A.O. Smith
Model	GPS-75
Category	Water Heater
Language	English

Related product manuals

A.O. Smith GPCR

20 pages

A.O. Smith GPDH