16
Moderate
Noritz · Tankless Water Heaters
Abnormally high outlet water temperature detected.
Quick Answer
Error code 16 on your Noritz Tankless Water Heaters means: Abnormally high outlet water temperature detected.. This is usually fixable — see the step-by-step guide below.
Affected Models
Likely Causes
How to Fix It
1
Power down and allow unit to cool.
2
Flush unit to remove scale buildup.
3
Verify adequate water flow rate.
4
Check/set outlet temperature correctly.
5
Have technician inspect control components if recurring.
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Related Error Codes