Tankless Water Heater Error Codes

As someone who has faced my fair share of challenges with my tankless water heater, I understand the frustration that comes with encountering error codes. These cryptic messages can quickly turn a relaxing hot shower into a stressful situation. In this guide, we will dive into the world of tankless water heater error codes, unraveling their meanings, and providing solutions to help you troubleshoot common issues.

Common Tankless Water Heater Error Codes

When it comes to owning a tankless water heater, dealing with error codes is something every homeowner may face at some point. These error codes are your unit’s way of communicating that something might be amiss, helping you troubleshoot and resolve issues efficiently.

Here are some common tankless water heater error codes you might encounter:

Error Code 11: This often indicates an issue with the ignition or that the unit is struggling to ignite properly.
Error Code 13: Typically points to a ventilation problem, highlighting issues with how the unit is exhausting gases.
Error Code 29: Indicates a problem with the air intake, exhaust, or the gas valve.
Error Code 51: Points to a water flow issue, which could be related to a dirty water filter or a problem with the circulation system.

When you encounter these error codes, it’s essential to refer to your unit’s manual for specific troubleshooting steps. In many cases, these errors can be resolved by following the manufacturer’s guidelines or seeking professional help when needed.

Remember, regular maintenance of your tankless water heater can help prevent these error codes from occurring frequently. Ensuring proper ventilation, clean filters, and timely inspections can go a long way in maintaining the efficiency of your unit.

Code E1: No ignition

One of the most common error codes you might encounter with your tankless water heater is the “Error Code 11.” This error usually indicates that there is no ignition during the startup phase. This could be due to issues with gas supply, blocked burner, or even a faulty igniter. It’s essential to check these components to resolve the problem.

Another frequent error is the “Error Code 13,” which points to a problem with the water flow rate. This could be caused by a clogged filter, an issue with the inlet water supply, or even a problem with the pump. Ensuring proper water flow and checking the filter regularly can help prevent this error.

If you come across an “Error Code 29,” it typically signifies an air intake or exhaust blockage. This could be a dangerous situation as it impacts the combustion process. Make sure the vents are clear of any obstructions and that the unit has proper ventilation to eliminate this error.

Some models might display an “Error Code 90” when there is a build-up of scale or lime deposits within the system. Regular maintenance, like descaling your tankless water heater, can help prevent this error and keep your unit running efficiently.

Lastly, an error like “Error Code 99” could indicate a communication error between the components of your tankless water heater. Checking the wiring, control board, and ensuring all connections are secure can often resolve this issue.

Code E2: Overheating

When it comes to tankless water heaters, encountering error codes can be frustrating, but understanding common issues can help you troubleshoot effectively.

One error code that users often face is “Error Code 11,” which usually indicates an ignition problem during startup. This can stem from various issues like gas supply problems, a blocked burner, or a malfunctioning igniter.

Another common error is “Error Code 13,” which signals issues with water flow rate. A clogged filter, inlet water problems, or pump malfunctions can trigger this error.

If you see “Error Code 29” on your display, it points to air intake or exhaust blockages. Ensuring proper ventilation and checking for obstructions in the vents is crucial to avoid safety hazards.

Scale or lime deposits causing “Error Code 90” can be prevented by regular descaling maintenance of your tankless water heater.

Lastly, “Error Code 99” might indicate communication problems between components. Checking wiring and connections can often resolve this issue.

Code E3: Ignition failure

Encountering error codes on your tankless water heater can be frustrating, but with a bit of troubleshooting knowledge, you can often resolve the issue without the need for a professional service call.

One common error that many users face is “Error Code 11.” This code typically indicates an ignition problem during startup. Issues like gas supply problems, a blocked burner, or a malfunctioning igniter can be the culprits behind this error.

Another frequently encountered error is “Error Code 13,” which is related to water flow rate issues. If you see this code, it could be due to a clogged filter, inlet water problems, or pump malfunctions affecting the water flow in your system.

When “Error Code 29” appears on your display, it’s a signal of air intake or exhaust blockages. To prevent safety hazards, it’s important to ensure proper ventilation and check for any obstructions in the vents.

Dealing with “Error Code 90”? This code often indicates scale or lime deposits in the system. Regular descaling maintenance can help prevent this issue and keep your tankless water heater operating efficiently.

Lastly, “Error Code 99” might point to communication problems between different components of your tankless water heater. Checking the wiring and connections can often help resolve this communication issue.

Code E4: Flushing system

Code E5: Flame failure

Here are some common tankless water heater error codes that you may encounter:

Error Code 11: This error usually signifies an ignition problem during startup. It can be caused by issues such as gas supply problems, a blocked burner, or a malfunctioning igniter.
Error Code 13: This error is typically related to water flow rate issues. Possible reasons for this error include a clogged filter, inlet water problems, or malfunctions affecting water flow.
Error Code 29: When you see this error, it indicates air intake or exhaust blockages. Proper ventilation and checking for obstructions in the vents are crucial to avoid safety hazards.
Error Code 90: This error often points to scale or lime deposits in the system. Regular descaling maintenance can help prevent this issue and keep your tankless water heater functioning properly.
Error Code 99: If you encounter this code, it might signal communication problems between different components of your tankless water heater. Checking the wiring and connections can help resolve this issue.

Code E7: Communication error

Encountering error codes on your tankless water heater can be frustrating, especially when you’re left wondering what they mean and how to address them. Understanding these codes is essential for troubleshooting and ensuring your unit operates smoothly.

When you see an error code like 11, it’s crucial to investigate the ignition system promptly. Issues with gas supply, burner blockages, or igniter malfunctions can all trigger this error. Addressing these issues promptly can help your tankless water heater start up efficiently.

Error code 13 often points to water flow rate problems, which can be caused by various factors like a clogged filter or inlet water issues. Maintaining proper water flow is key to the unit’s performance, so resolving these problems is vital.

If error code 29 appears, it’s a warning of potential air intake or exhaust blockages. Checking ventilation systems and clearing any obstructions in the vents is essential for safety and efficient operation.

Another common issue is error code 90, indicating scale or lime deposits in the system. Regular descaling maintenance is critical to prevent these deposits from affecting the unit’s functionality and lifespan.

Lastly, error code 99 may indicate communication problems between different components of the tankless water heater. Verifying the wiring and connections can often help resolve this issue and restore proper functionality.

By familiarizing yourself with these common error codes and their possible causes, you can troubleshoot effectively and keep your tankless water heater running smoothly.

Troubleshooting and Solutions

When encountering error codes on your tankless water heater, it can be frustrating and concerning, especially if you’re in need of hot water. However, with a bit of troubleshooting, many of these issues can be resolved without the need for a professional. Here are some common error codes you might come across and some solutions to help you get your tankless water heater back up and running:

Error Code 10: This error typically indicates a problem with the combustion process. Check for issues with the gas supply, venting, or the ignition system. Make sure the gas line is open and free of blockages, and ensure that the venting system is properly installed and not obstructed.
Error Code 11 or 12: These codes often point to an issue with the ignition or the flame rod. You can try cleaning the flame rod to see if that resolves the problem. If the issue persists, you may need to replace the flame rod or have a professional take a look at the ignition system.
Error Code 13: Error code 13 usually indicates a problem with the water flow rate. Check for any obstructions in the water inlet filter and ensure that the water pressure is sufficient for the unit to operate correctly.
Error Code 29: This code typically signals an issue with the air intake or exhaust system. Inspect the venting for blockages or damage and ensure that the air intake and exhaust pipes are free of obstructions.
Error Code 99: Error code 99 is a general safety warning. Try resetting the unit by turning it off and on again. If the error persists, consult the manufacturer’s manual for specific instructions on how to address this issue.

Remember, if you are uncomfortable with any of the troubleshooting steps or if the error code persists after attempting the solutions provided, it’s always best to contact a professional technician to assess and fix the problem. Safety should be a top priority when dealing with any issues related to your tankless water heater.

Check for gas supply issues

When troubleshooting tankless water heater error codes, it’s essential to address them promptly to ensure your unit operates efficiently.

For error code 11, investigate the ignition system for gas supply issues, burner blockages, or igniter malfunctions.
Error code 13 often indicates water flow rate problems, which can result from clogged filters or inlet water issues.
If you encounter error code 29, check for air intake or exhaust blockages by inspecting the ventilation systems.
Error code 90 warns of scale or lime deposits in the system, highlighting the importance of regular descaling maintenance.
Lastly, error code 99 may point to communication problems between components, which can often be resolved by verifying wiring and connections.