Noritz tankless water heater no hot water no error code

Are you experiencing issues with your Noritz tankless water heater where there is no hot water and no error code displayed? This situation can be frustrating, but we are here to help. Let’s troubleshoot the problem together to identify the root cause and find a solution. By following some simple steps, we can work towards restoring your hot water supply efficiently.

Noritz tankless water heater no hot water no error code – What could be causing this error?

When facing a Noritz tankless water heater that is not producing hot water and not displaying an error code, several factors could be contributing to this issue. It is essential to consider potential causes such as insufficient gas supply, a blockage in the water flow, incorrect water temperature settings, a malfunctioning heating element, inadequate ventilation, or a faulty temperature sensor. Additionally, the problem could stem from issues with the power source, such as electrical failures or tripped breakers. Regular maintenance, including descaling and cleaning the unit, can also prevent performance issues. Proper troubleshooting and professional inspection may be necessary to determine the specific cause and resolve the no hot water no error code problem effectively.

Noritz tankless water heater no hot water no error code – How to Fix?

To address the issue of a Noritz tankless water heater not producing hot water and not displaying an error code, follow these steps for troubleshooting:

  1. Check the water flow: Ensure that the water supply is sufficient and that there are no blockages in the system.
  2. Inspect the gas supply: Verify that the gas supply to the unit is adequate and that there are no issues with the gas line.
  3. Check the venting system: Make sure the vent pipe is properly installed and not blocked to allow for proper air intake and exhaust.
  4. Reset the unit: Try resetting the water heater following the manufacturer’s instructions to see if it resolves the issue.
  5. Monitor the temperature settings: Check the set temperature on the water heater to ensure it is appropriately adjusted for hot water production.
  6. Contact a professional: If the issue persists after these steps, it may be necessary to contact a qualified technician for further diagnosis and repair.

Following these troubleshooting steps should help in resolving the Noritz tankless water heater not providing hot water without displaying an error code.


Noritz tankless water heater: no hot water, no error code. If your Noritz tankless water heater is not producing hot water and there is no error code displayed, check the power supply, gas supply, and water flow. Ensure the unit is properly vented and that there are no blockages in the system. If issues persist, consider contacting a professional for further assistance.

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