Noritz Error Code 16: Over-Temperature

How to Fix Noritz Code 16

1. Check if the incoming water temperature is too high. If it is, contact your local water department.
2. Ensure that the water flow is not restricted. If it is, try to clear any clogs.
3. If the above steps don't work, it's best to call a professional HVAC technician.

How to Reset Noritz Code 16

1. Turn off the unit using the power button on the front panel.
2. Turn off the gas supply valve.
3. Turn off the circuit breaker supplying power to the unit. Wait 30 seconds.
4. Restore power at the breaker, then open the gas valve.
5. Turn the unit back on. If the error returns, the underlying issue needs repair.

Resetting clears the code from the display but does not fix the underlying fault. If the code returns after reset, proceed to the diagnostic steps above.

What Does Noritz Error Code 16 Mean?

The Noritz 16 error code indicates that the water temperature has exceeded the set limit. This could be due to a faulty temperature sensor or a problem with the control board. The heater is still safe to use, but it's important to have it checked by a professional to prevent any potential damage or safety hazards.

Common Causes

• Faulty temperature sensor
• Problem with the control board
• High incoming water temperature
• Clogged or restricted water flow

Diagnostic Steps

Replacement Parts

Related Codes on Same Models

Other codes that affect the same Noritz model families as 16.