Noritz Error Code List PDF: A Comprehensive Guide
A detailed PDF outlines common issues, like outlet temperature spikes (Code 16) often due to scale. Troubleshooting guides and Noritz support are readily available online.
Noritz has become a leading name in on-demand tankless water heating, renowned for its efficiency, reliability, and innovative technology. Unlike traditional tank water heaters that continuously heat and store water, Noritz units heat water only when it’s needed, eliminating standby heat loss and significantly reducing energy consumption. This makes them an environmentally friendly and cost-effective choice for homes and businesses.
However, like any sophisticated appliance, Noritz tankless water heaters can occasionally encounter operational issues, which are often communicated to the user through error codes displayed on the unit’s control panel; Understanding these error codes is crucial for efficient troubleshooting and maintaining optimal performance. A comprehensive Noritz error code list PDF serves as an invaluable resource for homeowners, plumbers, and technicians alike, providing a quick reference guide to diagnose and resolve common problems. These codes pinpoint the source of the issue, ranging from simple fixes like low water pressure to more complex problems requiring professional attention.
Understanding Noritz Error Codes
Noritz tankless water heaters utilize a self-diagnostic system, employing error codes to signal malfunctions or operational issues. These codes aren’t random; they are specifically designed to identify the problem area within the unit, streamlining the troubleshooting process. A Noritz error code list PDF deciphers these signals, translating numerical codes into understandable descriptions of the fault.
Error codes can range from simple issues like low water pressure (Code 9) or a freeze warning (Code 5) that a homeowner might address, to more complex problems like combustion air intake errors (Code 6) or gas valve failures (Code 11) requiring a qualified technician. Recognizing the difference is key. The PDF guides users through initial checks and potential solutions, but always emphasizes safety and the importance of professional assistance when dealing with gas appliances. Properly interpreting these codes minimizes downtime and ensures the longevity of your Noritz system.
Common Noritz Error Codes & Troubleshooting
The PDF details frequent codes like flame rectification (Code 1), overheat (Code 2), and ignition errors (Code 3). Descaling addresses scale buildup issues.
Error Code 1: Flame Rectification Error
Error Code 1 on a Noritz tankless water heater indicates a problem with flame rectification. This means the unit is failing to properly detect the presence of a flame during operation. Several factors can contribute to this issue, ranging from minor to more complex problems requiring professional attention.
Common causes include a dirty or faulty flame sensor, insufficient gas supply, or issues with the ignition system itself. A dirty flame sensor is often the simplest fix, as cleaning it can restore proper functionality. However, a damaged sensor will need replacement. Gas supply problems might involve a closed gas valve, low gas pressure, or a malfunctioning gas regulator.
Troubleshooting steps often involve visually inspecting the flame sensor, verifying the gas supply, and checking for any obstructions in the burner assembly; If the error persists after these checks, it’s crucial to contact a qualified technician to diagnose and repair the underlying issue safely and effectively. Ignoring this error can lead to inefficient operation or even a complete system shutdown.
Error Code 2: Overheat Error
Noritz Error Code 2 signals an overheat condition within the unit, a potentially serious issue demanding immediate attention. This indicates the water temperature has exceeded safe operating limits, triggering a safety shutdown to prevent damage to the heat exchanger and other components.
Several factors can cause overheating. Restricted water flow, often due to scale buildup within the heat exchanger, is a primary culprit. Insufficient ventilation, leading to improper combustion, can also contribute. A malfunctioning high-limit sensor, responsible for detecting excessive temperatures, might also be the source of the problem.
Initial troubleshooting involves checking for any obstructions in the water inlet or outlet pipes. Descaling the unit is often recommended, especially in areas with hard water; If the error persists, a technician should inspect the high-limit sensor and combustion air intake. Ignoring this error can lead to significant damage and costly repairs, so prompt action is essential.
Error Code 3: Ignition Error
A Noritz Error Code 3 signifies a failure in the ignition system, preventing the burner from lighting. This can manifest as repeated clicking sounds, or no attempt at ignition at all. Several potential causes contribute to this issue, ranging from minor to more complex problems requiring professional attention.
Common culprits include a faulty igniter, a defective flame sensor, or an interruption in the gas supply. Low gas pressure, or a malfunctioning gas valve, can also prevent successful ignition. Electrical issues, such as a loose wiring connection, can disrupt the ignition sequence.
Troubleshooting begins with verifying the gas supply is fully open and that other gas appliances are functioning correctly. Checking the igniter for visible damage is also a good first step. If the problem persists, a qualified technician should inspect the flame sensor, gas valve, and electrical connections. Ignoring this error can lead to a buildup of unburnt gas, posing a safety hazard.
Error Code 4: Water Flow Error
Noritz Error Code 4 indicates the unit isn’t detecting sufficient water flow, preventing it from firing up. This safety feature protects the heating element from overheating and damage. Several factors can trigger this error, ranging from simple obstructions to more serious plumbing issues.
The most common cause is a blocked inlet filter, restricting water passage. Low water pressure, particularly during peak demand, can also trigger the error. Air trapped within the water lines can disrupt flow detection. A faulty flow sensor itself may provide inaccurate readings, falsely indicating insufficient flow.
Initial troubleshooting involves checking and cleaning the inlet filter. Ensure all water supply valves are fully open and that other fixtures aren’t simultaneously demanding high water volume. If the problem persists, a technician should inspect the flow sensor and plumbing for leaks or obstructions. Addressing this promptly prevents potential damage to the unit.
Error Code 5: Freeze Warning
Noritz Error Code 5 signals that the unit has detected temperatures nearing freezing levels, posing a risk of damage to internal components. Tankless water heaters, while efficient, are susceptible to freezing in colder climates if not properly protected. This error activates as a preventative measure, shutting down the unit to avoid costly repairs.
The primary cause is typically ambient temperatures dropping below 32°F (0°C). Insufficient insulation around the unit or exposed plumbing lines exacerbates the risk. Inadequate circulation of water through the heater, especially during periods of low demand, can also contribute. Power outages impacting circulation pumps are another potential trigger.
Immediate action is crucial: insulate exposed pipes and the unit itself. Ensure adequate heating in the installation area. If a power outage is the cause, restore power once available. Contact a qualified technician to assess the system and prevent future occurrences. Ignoring this warning can lead to burst pipes and irreparable damage.
Error Code 6: Combustion Air Intake Error
Noritz Error Code 6 indicates a problem with the air supply needed for proper combustion within the tankless water heater. This is a critical safety issue, as insufficient air can lead to incomplete combustion and the production of carbon monoxide – a dangerous, odorless gas.
Common causes include blocked or restricted air intake vents, often due to debris, snow, or ice. Improper venting installation, failing to meet manufacturer specifications, is another frequent culprit. Negative air pressure within the building, created by exhaust fans or tightly sealed construction, can also disrupt airflow. A malfunctioning air pressure switch within the unit may also trigger this error.
Do not attempt to operate the heater with this error present. Inspect the air intake vent for obstructions and clear them carefully. Contact a qualified HVAC technician immediately to diagnose the root cause and ensure safe operation. Proper ventilation is paramount for safe and efficient performance.
Error Code 7: Exhaust Temperature Sensor Error
Noritz Error Code 7 signals a malfunction detected by the exhaust temperature sensor. This sensor monitors the temperature of the flue gases exiting the unit, a crucial safety component ensuring proper venting and preventing overheating. A faulty reading can indicate a problem with the sensor itself, its wiring, or the unit’s overall combustion process.
Potential causes include a defective sensor requiring replacement, loose or corroded wiring connections, or damage to the sensor’s wiring harness. In some cases, excessively high exhaust temperatures due to scale buildup or improper combustion can also trigger this error. Ignoring this code can lead to inefficient operation and potential safety hazards.
Do not attempt self-repair if you are not a qualified technician. Inspect wiring connections for obvious damage. Contact a certified HVAC professional for accurate diagnosis and repair, including sensor testing and potential replacement. Prioritize safety and proper venting.
Error Code 8: Water Temperature Sensor Error
Noritz Error Code 8 indicates a problem with the internal water temperature sensor. This sensor is vital for accurately monitoring the water temperature as it passes through the heat exchanger, ensuring consistent and safe hot water delivery. A malfunctioning sensor disrupts this process, potentially leading to scalding or insufficient heating.
Common causes include a faulty sensor needing replacement, damaged or corroded wiring connections, or issues with the sensor’s internal components. Scale buildup within the heat exchanger can also contribute to inaccurate temperature readings, triggering the error. Ignoring this code can result in inconsistent water temperatures and potential discomfort.
Do not attempt self-repair without proper training. Carefully inspect wiring for damage. Contact a qualified HVAC technician for a thorough diagnosis, sensor testing, and potential replacement. Prioritize safety and accurate temperature regulation.
Error Code 9: Low Water Pressure
Noritz Error Code 9 signals insufficient water flow to activate the unit’s heating process. Tankless water heaters require a minimum flow rate – typically around 0.5 gallons per minute – to detect water demand and initiate combustion. Low pressure prevents proper heat exchanger operation and triggers this safety error.
Potential causes include closed or partially closed inlet valves, a clogged water filter, low municipal water pressure, or simultaneous high water usage elsewhere in the home. Multiple fixtures running concurrently can reduce available pressure. Scale buildup within the unit’s water pathways can also restrict flow.
Check inlet valves and filters first. Verify adequate water pressure throughout your home. If the issue persists, contact a qualified plumber or Noritz technician to diagnose and resolve the underlying pressure problem. Ignoring this error can lead to inconsistent heating and potential damage.
Error Code 10: High Water Temperature Limit
Noritz Error Code 10 indicates the outlet water temperature has exceeded the pre-set safety limit. This is a critical safety feature designed to prevent scalding and potential damage to the unit. The system automatically shuts down to avoid overheating and ensures user safety.
Common causes include a malfunctioning temperature sensor, a faulty control board, or scale buildup restricting water flow, leading to localized overheating. Incorrect temperature settings or a failing mixing valve can also contribute to this error. Scale buildup hampers heat transfer, causing the unit to overcompensate.
Do not attempt to reset the unit repeatedly. Contact a qualified Noritz technician immediately to diagnose and address the root cause. Descaling the unit may be necessary. Ignoring this error poses a significant scalding risk and could lead to further system damage.
Error Code 11: Gas Valve Error
Noritz Error Code 11 signals a problem with the gas valve, preventing proper gas flow to the burner. This can manifest as a complete lack of heat or intermittent heating issues. The gas valve is a crucial component for safe and efficient operation, and this error requires immediate attention.
Potential causes include a faulty gas valve solenoid, a blocked gas line, low gas pressure, or a communication issue between the control board and the valve. Sometimes, a simple gas pressure issue is the culprit, requiring adjustment by a technician.
Do not attempt to repair the gas valve yourself; this is extremely dangerous. Contact a qualified and licensed gas technician or Noritz support immediately. They will verify gas supply, inspect the valve, and ensure proper operation. Ignoring this error can lead to a hazardous situation.
Error Code 12: Fan Motor Error
A Noritz Error Code 12 indicates a malfunction within the unit’s fan motor system. This fan is critical for both combustion air intake and exhaust expulsion, ensuring safe and efficient operation. When this error appears, the water heater will likely shut down to prevent potential hazards.
Possible causes range from a failed fan motor itself to obstructions blocking the fan blades, or even electrical issues affecting the motor’s power supply. A failing fan can also be linked to a faulty control board sending incorrect signals.
Do not attempt to disassemble or repair the fan motor yourself. Contact a qualified technician or Noritz support for diagnosis and repair. They will check for obstructions, test the motor’s functionality, and verify proper electrical connections. Addressing this promptly is vital for safe operation.
Error Code 13: Scale Buildup Detection
Noritz Error Code 13 signals the detection of excessive scale buildup within the heat exchanger. This buildup significantly reduces heating efficiency and can lead to overheating or even component failure. Scale forms due to minerals present in the water supply, particularly in areas with hard water.
The unit’s sensors monitor temperature differentials; a reduced heat transfer indicates scale accumulation. Ignoring this error can cause long-term damage and necessitate costly repairs or replacement. A sharp spike in outlet water temperature can also be a symptom.
The recommended solution is a descaling procedure using a Noritz-approved descaling solution. This should be performed by a qualified technician. Regular descaling, based on water hardness, is crucial preventative maintenance. Consider a water softener to minimize future scale formation.
Error Code 14: Communication Error (Between Units)
Noritz Error Code 14 indicates a failure in communication between different components of your tankless water heating system. This typically occurs in setups utilizing multiple modules, such as a boiler paired with an outdoor reset sensor or a remote control. The error disrupts the coordinated operation of the system.
Possible causes include loose wiring connections, a faulty control board, or interference affecting the communication signal. A technician will systematically check all wiring and connections between the affected units.
Troubleshooting involves verifying the integrity of the communication wiring and ensuring proper voltage levels. Replacing a faulty control board or resetting the communication parameters may also be necessary. If a remote control is involved, ensure it has fresh batteries and is properly paired with the main unit.
Error Code 15: Outdoor Sensor Error
Noritz Error Code 15 signals a problem with the outdoor reset sensor, a component crucial for modulating water temperature based on external conditions. This sensor informs the unit of the ambient temperature, allowing it to optimize performance and energy efficiency. When this sensor fails, the system defaults to a pre-set temperature, potentially leading to discomfort or inefficiency.
Common causes include a faulty sensor, damaged wiring, or a disconnection. A technician will first verify the sensor’s wiring and connections, ensuring they are secure and free from corrosion.
Troubleshooting involves testing the sensor’s resistance and voltage output. If the sensor is defective, it must be replaced. Proper sensor placement and shielding from direct sunlight are also important for accurate readings and reliable operation. Ignoring this error can lead to inconsistent water temperatures.
Less Common, But Important Noritz Error Codes
While less frequent, codes like 16 (temperature spike) or 90 (initialization) demand attention. Addressing these promptly prevents escalating issues and ensures optimal performance.
Error Code 16: Outlet Water Temperature Spike
Error Code 16 on a Noritz tankless water heater signals a dangerously rapid increase in the outlet water temperature. This isn’t simply a comfort issue; it represents a potential safety hazard and indicates a problem with the unit’s ability to regulate heat effectively. A primary culprit behind this error is often scale buildup within the heat exchanger.
Scale acts as an insulator, hindering efficient heat transfer. To compensate, the burner fires hotter, leading to the temperature spike. Hard water areas are particularly susceptible to this issue. However, Code 16 can also stem from a malfunctioning temperature sensor or, less commonly, a gas valve problem. Performing a descaling procedure, using a Noritz-approved descaling kit, is usually the first troubleshooting step. If the error persists after descaling, professional service is crucial to diagnose and address potential component failures, ensuring safe and reliable operation of your Noritz unit.
Error Code 17: Inlet Water Temperature Error
Noritz Error Code 17 indicates an issue with the incoming water temperature being outside the expected range. This doesn’t necessarily mean the water is too hot or too cold, but rather that the sensor is detecting a value that the unit isn’t programmed to handle. Several factors can trigger this error. A common cause is extremely cold inlet water temperatures during freezing conditions, even if a freeze warning (Code 5) isn’t active.
Conversely, unusually warm inlet water, perhaps from prolonged sun exposure of pipes, can also cause the error. A faulty inlet water temperature sensor is another possibility. Troubleshooting involves checking the sensor’s wiring and ensuring it’s properly connected. If the sensor appears functional, investigate the water supply lines for any unusual heat sources or insulation issues. Professional diagnosis is recommended if the problem persists, as it could indicate a more complex system malfunction.
Error Code 18: Combustion Fan Error
A Noritz Error Code 18 signals a problem with the combustion fan, crucial for supplying air for proper burning. This error indicates the fan isn’t operating within the expected parameters – it might be failing to start, running too slowly, or experiencing intermittent operation. A blocked fan intake, due to dust or debris, is a frequent cause and should be checked first. Inspect the fan blades for any obstructions or damage.
Electrical issues, such as a faulty fan motor or wiring problems, can also trigger this code. Troubleshooting involves verifying the fan’s power supply and checking for any loose connections. If the fan appears to be receiving power but isn’t functioning correctly, the motor likely needs replacement. Due to the safety implications of combustion issues, professional service is strongly advised for diagnosing and resolving this error.
Error Code 19: Gas Pressure Switch Error
Noritz Error Code 19 indicates a malfunction with the gas pressure switch, a vital safety component. This switch verifies adequate gas supply before ignition, preventing unsafe operation. The error suggests the switch isn’t detecting sufficient gas pressure, or is malfunctioning and sending an incorrect signal. A common cause is a simple gas pressure issue; a technician can verify and adjust the pressure to the correct level using the unit’s keypad.
However, a faulty gas pressure switch itself is also a likely culprit and requires replacement. Blockages in the gas line, or a failing gas valve, can also contribute to this error. Never attempt to bypass or repair the gas pressure switch yourself – gas leaks are extremely dangerous. Always contact a qualified technician for diagnosis and repair to ensure safe and proper operation of your Noritz tankless water heater.
Error Code 90: System Initialization Error
Noritz Error Code 90 signals a problem during the unit’s startup sequence, indicating the system failed to initialize correctly. This can occur after a power outage, initial installation, or during a reset attempt. Several factors can trigger this error, including incomplete wiring, a faulty control board, or issues with the gas supply. It’s often seen with the NRCB199DV combi boiler model during initial setup;
Before proceeding, verify the main power supply is stable and all wiring connections are secure. If the problem persists, the control board itself may be defective and require replacement by a qualified technician. Do not attempt to diagnose or repair internal components without professional expertise. Contacting Noritz technical support is recommended to guide troubleshooting and ensure a safe resolution to this system initialization failure.
Error Code 91: Remote Control Communication Error
Noritz Error Code 91 indicates a disruption in communication between the main unit and its remote control. This prevents users from adjusting settings or monitoring the water heater’s status remotely. Potential causes include a weak wireless signal, interference from other devices, or a malfunctioning remote control unit itself. Check the batteries in the remote first, ensuring they are fresh and properly installed.
If the batteries aren’t the issue, try repositioning the remote closer to the Noritz unit to improve signal strength. Avoid obstructions that could interfere with the wireless connection. If the error persists, the remote control may need to be reset or replaced. Consulting the Noritz documentation or contacting technical support can provide specific guidance for your model and ensure proper reconnection.
Error Code 99: General System Error
Noritz Error Code 99 signifies a broad, undefined system malfunction within the tankless water heater. This is often a catch-all code indicating the unit has detected an issue it cannot specifically identify. It’s a critical error demanding immediate attention, as it suggests a potentially serious problem affecting the unit’s operation and safety.
Troubleshooting Code 99 typically requires a professional technician. Attempting self-repair could exacerbate the issue or void the warranty. The technician will utilize diagnostic tools to pinpoint the root cause, which could range from a faulty control board to a sensor failure. Resetting the unit might temporarily clear the code, but the underlying problem will likely return. Prioritize contacting Noritz technical support or a qualified plumber for a thorough inspection and repair.
Resources for Noritz Error Code Information
Official Noritz PDFs, online troubleshooting guides, and direct contact with Noritz technical support offer comprehensive assistance for diagnosing and resolving error codes.
Downloading the Official Noritz Error Code PDF
Accessing the official Noritz error code PDF is a crucial first step in diagnosing issues with your tankless water heater. These documents, provided directly by Noritz, contain the most accurate and up-to-date information regarding error codes, their meanings, and recommended troubleshooting steps. Typically, you can find these PDFs on the official Noritz website, often within the support or downloads section.
Look for documentation specific to your model number, as error codes can vary between different Noritz units. The PDF will usually detail each error code, explaining the potential causes – ranging from simple fixes like low water pressure to more complex problems requiring professional attention. Downloading and reviewing this PDF empowers you to understand the issue and potentially resolve it yourself, saving time and service call fees. Ensure you have a stable internet connection and a PDF reader installed on your device to successfully download and view the document.
Online Noritz Troubleshooting Guides
Beyond the official PDF, a wealth of Noritz troubleshooting resources exists online. YouTube channels dedicated to plumbing and HVAC often feature videos demonstrating how to diagnose and fix common Noritz error codes; These visual guides can be incredibly helpful, especially for those less comfortable with technical manuals.
Furthermore, numerous online forums and communities discuss Noritz tankless water heaters, providing a platform for users to share their experiences and solutions. Websites specializing in appliance repair frequently host articles and guides addressing specific Noritz error codes. Remember to verify the source’s credibility before implementing any suggested fixes. Searching for your specific error code (e.g., “Noritz Error Code 90”) will yield targeted results. Utilize these resources in conjunction with the official PDF for a comprehensive troubleshooting approach.
Contacting Noritz Technical Support
When online resources and the official PDF prove insufficient, direct contact with Noritz Technical Support is crucial. They possess in-depth knowledge of their products and can provide tailored assistance for complex error codes. A skilled technician can verify gas pressure settings, a common issue linked to certain errors, and adjust your unit accordingly.
Noritz provides a dedicated phone line – 1-877-508-6667 – for technical support inquiries. Be prepared to provide your unit’s model number and a detailed description of the error code and any accompanying symptoms. Noritz emphasizes fairness and respect in all client interactions, aiming for excellent customer service. While self-troubleshooting is valuable, professional guidance ensures accurate diagnosis and safe repairs, preventing potential damage or safety hazards. Don’t hesitate to reach out for expert help.