AO Smith Water Heater Blinks 3 Times: Troubleshooting Guide

By SmartHomeBit Staff •  Updated: 06/06/23 •  11 min read

Understanding AO Smith Water Heater Troubleshooting Lights

If you’re experiencing issues with your AO Smith Water Heater, understanding the troubleshooting lights can help you pinpoint the problem quickly. In this section, we’ll take a closer look at the common status light flashing codes and what they indicate. By examining the Reference Data provided, we can determine how to diagnose and fix issues as they arise, ensuring you have hot water when you need it.

Common Status Light Flashing Codes

If you own an AO Smith water heater, it’s important to know the common status light flashing codes. These codes can give you an idea of what needs fixing or replacing.

For instance, one flash could mean an open temperature sensor or thermistor. Two flashes could mean an overheating issue due to a malfunctioning or improperly sized thermostat. Three flashes may indicate an issue with the blower motor, pressure switch, gas valve, or blocked exhaust vent. Four flashes could be high-temperature protection mode or malfunction in thermal safety switch/ hi-limit switch. Six flashes signify a faulty electronic control unit that requires replacement.

It’s important to do routine maintenance on water heaters to extend their life and increase efficacy. The AO Smith Water Heater Troubleshooting guide suggests that continuous usage without periodic maintenance may damage components, leading to common status flashing light issues.

A.O.Smith makes durable and high-performing water heaters, but it’s still highly recommended to consult professionals for installation, repair, and maintenance. Regular inspection by authorized technicians is suggested to avoid expensive replacements and repairs caused by any delays in recognizing warning signs indicated by the flashing light codes.

AO Smith Water Heater Blinks 3 Times

An AO Smith water heater blinking 3 times is a warning sign that something has gone wrong. In this section, we will explore the possible causes for this 3 flash code, and what it means for your water heater. Get ready to troubleshoot and solve the problem with the help of valuable insights from our reference data.

Possible Causes of the 3 Flash Code

If your AO Smith Water Heater blinks 3 times, it means the pressure switch is not working correctly. It’s important for detecting air flow. So, if there’s not enough, the heater shuts down to keep you safe.

But, this isn’t the only cause. It could be a faulty gas valve or a blocked exhaust vent. These can cause further damage and put your safety at risk.

You need to diagnose the problem first. Then, you can start fixing it. Check out our article for solutions. It suggests checking continuity between switch terminals, replacing pressure switches, turning off gas valves, and clearing blockages in exhaust vents.

Don’t ignore the 3 flashes. Take immediate action and follow our guide. Otherwise, you’ll face bigger problems. Identify all causes and address them right away.

Solutions for Blinked Light due to Blower Problems

Are you having trouble with your AO Smith water heater blower due to blinked lights? Don’t worry, we’ve got you covered. In this section, we’ll discuss the solutions you need to check for continuity between switch terminals. With the reference data above, we will guide you through how to troubleshoot a blinked light caused by blower problems.

Checking Continuity between Switch Terminals

If your AO Smith water heater is giving you trouble, investigate the blinking codes. 3 blinks in a row could mean trouble with the blower pressure switch. Here’s how to check continuity between switch terminals:

  1. Shut down the power by unplugging your water heater or switching off the main circuit breaker.
  2. Refer to the wiring diagram and locate the blower pressure switch terminals.
  3. Bring out a multimeter, set it to continuity mode.
  4. Place one test lead on one terminal and the other test lead on the other terminal.
  5. If there is no reading, the circuit may be broken, meaning no continuity flow between the two terminals.
  6. A reading indicates that everything is okay until this point. Further checks must be done to find out what went wrong.

Safety measures must be taken when troubleshooting your water heater. If you’re not sure how to handle electrical systems, it is advisable to get professional help. Checking continuity between switch terminals can fix blower pressure switch problems.

Solutions for Blinked Light due to Pressure Switch Problems

If you have noticed that your AO Smith water heater is blinking 3 times, the pressure switch could be the culprit. Don’t panic, we have got you covered! In this section, we will explore the solutions to fix the blinked light arising from pressure switch problems. We will specifically look at the replacement of a failed pressure switch. Let’s dive into the solutions without further ado.

Replacing Failed Pressure Switch

When your AO Smith Water Heater blinks three times, there’s a problem with the pressure switch. Don’t worry though! We’ve got a three-step guide for replacing it.

  1. First, turn off the power.
  2. Disconnect all wires and tubing connected to the pressure switch.
  3. Carefully remove the old pressure switch and replace it with a new one. Connect wiring and tubing according to the manufacturer’s instructions.

Be sure to ensure all electrical connections are secure and all tubing is correctly connected. You also need to get an exact replacement model from the manufacturer. Different models have different specs and components. If you don’t get the right one, it’ll cause more issues.

In conclusion, replacing a failed pressure switch on an AO Smith Water Heater takes three steps. Pay close attention to wiring connections and getting the right replacement parts. That way, you can prevent any further damage or malfunction in your system.

Solutions for Blinked Light due to Faulty Gas Valve

Gas valves and their proper functioning are critical points in AO Smith water heaters. In this section, we’ll discuss the solutions for blinked light due to faulty gas valve in AO Smith water heaters. We’ll explain what actions need to be taken and how to turn gas valve control to the off position.

Turn Gas Valve Control to Off Position

If the gas valve on your AO Smith water heater is blinking three times, it means there’s a problem. To resolve it safely, you need to switch off the gas valve control. Here’s how:

  1. Find the gas valve control knob.
  2. Turn the knob so ‘off‘ is in the top position.
  3. Look at the sight glass near the bottom of your water heater, to see if the pilot light is off.
  4. If there’s a gas smell in the room, open windows or doors to ventilate.

Remember: don’t use an open flame if you smell gas. This could cause an explosion, which could be deadly.

Solutions for Blinked Light due to Blocked Exhaust Vent

Has your AO Smith water heater been blinking 3 times, indicating a blocked exhaust vent? Don’t worry, we’ve got you covered. In this section, we’ll explore the solutions for handling this issue, focusing on clearing blockages to resolve the problem. With the help of these tips, you can not only get rid of the blinking light but also ensure the smooth and efficient functioning of your water heater.

Clearing Blockage to Solve the Problem

Got a blink 3 times error on your AO Smith water heater? It might be a blockage in the exhaust vent! This blockage can cause the pressure switch to malfunction and shut off the burner. Debris, like bird feathers or rodents, can enter and obstruct the venting system. Overheating or tripping of high-limit switches can also occur.

The best way to fix it is to call a professional plumber. They have the right tools and knowledge to inspect and clear these vents. DIY tutorials won’t cut it, so better leave it to the experts! Clear the blockage to solve the problem, and you’ll be able to get your water heater running smoothly again.

Fixing AO Smith Water Heater Blinks 3 Times

Having issues with your A.O. Smith water heater? If it’s blinking three times, this is a sign of a problem with the ignition process. But don’t worry, you can fix it with some simple steps.

  1. First, check the gas supply. Make sure the gas valve is fully open and the gas line is okay.
  2. Second, clean the pilot light or igniter. This will make sure the ignition source is clean and clear.
  3. Third, test the flame sensor and control panel. Make sure they’re functioning correctly.

If your water heater still blinks three times after doing all this, then it’s time to call in a professional. Expert technicians can give you an in-depth analysis of the issue and tell you the best way to repair your water heater. Don’t let a blinking light defeat you – get help and get your water heater working again!

Conclusion and Final Thoughts on AO Smith Water Heater Troubleshooting Light

Regular maintenance and inspections helps keep the water heater in good condition. Mineral buildup, thermostat issues, or a failed heating element can cause malfunctions too. Flushing the tank, checking the thermostat, and inspecting the heating element should be done regularly.

In summary, homeowners should not neglect water heater repairs. This can lead to bigger costs later. Seeking professional assistance and addressing any issues quickly is the best way to keep the system in good condition and avoid breakdowns.

FAQs about Ao Smith Blinks 3 Times

What does it mean when my AO Smith water heater blinks 3 times?

When your AO Smith water heater blinks 3 times, it indicates a problem with the blower, pressure switch, gas control valve, or blocked exhaust vent.

How can I determine if the pressure switch is the cause of the blinking 3 times?

To determine if the pressure switch is the cause of the blinking 3 times, check for continuity and replace the switch if there is a lack of continuity or if it has failed to close. You can also remove the lead to see if that solves the issue.

What should I do if there is a problem with the blower?

If there is a problem with the blower, you may notice a decrease in the cubic feet of air moved per minute. The solution is to replace the blower.

Is it possible that the control board could be the issue?

While it’s unlikely that the control board is the issue when your AO Smith water heater blinks 3 times, it’s still possible. However, it’s important to check other components like the blower, pressure switch, and gas control valve first.

Can I replace the gas control valve myself?

You can replace the gas control valve yourself, but it’s recommended that you seek assistance from a professional. Additionally, if your water heater is over 10 years old, it may not be cost-effective to replace the gas control valve.

What steps should I take if the exhaust vent is blocked?

If the exhaust vent is blocked, you should clear the blockage to solve the problem. It’s important to ensure that the vent is clear of any debris or obstructions to prevent this issue from happening again in the future.

SmartHomeBit Staff