Noritz Error Code 06: Low recirculation flow (warning only) (Tankless)
Noritz error code 06 on a tankless water heater means: Low recirculation flow (warning only). It is also called Noritz diagnostic code 06.
Homeowner? What Noritz code 06 means for you
Usually minor Your tankless water heater is reporting: Low recirculation flow (warning only). This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.
Safe things you can check yourself
- Check that gas reaches the house: other gas appliances work, or the propane tank is not empty.
- Make sure the heater is plugged in and its breaker is on. In winter, keep the power on: it protects the unit from freezing.
- Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
- Check that the hot and cold water valves under the heater are fully open.
- If you have a remote controller, turn it off and on once. If the code comes back, call a technician.
Call (647) 657-2977Book a service call
Licensed technicians serving Vaughan, Toronto and the GTA.
What does Noritz error code 06 mean?
NRCR only. Warning that recirculation flow is low; the owner's guide groups 06, 061 and 062 as recirculation abnormality.
Applies to: Noritz NRCR92 / NRCR111
Common causes of Noritz code 06
- Clogged return line filter
- Air in the hot/return line (dedicated mode)
- Clogged crossover valve filter or valve installed the wrong way (crossover mode)
Noritz models that use code 06
Other Noritz Tankless codes
All Noritz Tankless Water Heater error codes →
Noritz code 06: homeowner questions
What does Noritz code 06 mean?
Low recirculation flow (warning only). NRCR only. Warning that recirculation flow is low; the owner's guide groups 06, 061 and 062 as recirculation abnormality.
Is it safe to keep using my tankless water heater with code 06?
Usually yes. Code 06 is normally minor, but if it keeps coming back have it checked.
Can I reset Noritz code 06 myself?
You can try one reset (power off for 30 seconds, then on). If Noritz code 06 comes back, the cause is still there and a licensed technician should check it.
Who can fix Noritz code 06 near me?
Aurora Star Tech Inc. repairs Noritz tankless water heaters in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.
Homeowner help: Tankless Water Heater No Hot Water: What to Check
Troubleshooting guides
- No hot water All brands · Tankless Water Heater
- Water temperature fluctuates All brands · Tankless Water Heater
- Cleaning ignition and flame rods - Noritz Noritz · Tankless Water Heater
- Cleaning the fan and burner - Noritz EZ/NRCR/CDV Noritz · Tankless Water Heater
- Descaling (flushing) the heat exchanger - Noritz Noritz · Tankless Water Heater
- Draining to prevent freezing - Noritz EZ/NRCR Noritz · Tankless Water Heater
- Field gas conversion NG to LP - Noritz NRCR/EZ Pro Noritz · Tankless Water Heater
- Heat exchanger replacement - Noritz NRC111 / NCC199 Noritz · Tankless Water Heater
- Heater does not fire when hot water is opened - Noritz tankless Noritz · Tankless Water Heater
- Recirculation not working or hot water slow - Noritz NRCR Noritz · Tankless Water Heater
- Water not hot enough or temperature fluctuates - Noritz tankless Noritz · Tankless Water Heater
Source: Noritz NRCR Pro training (NRCR92/NRCR111, Printable V3), NRCR Pro specific error codes, p.29; Noritz EZ/NRCR Owner's Guide (Rev. 10-25), Checking for error conditions, p.31. Written in our own words as a summary; always check the original manual.
General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.