Noritz Error 16: Outlet Water Temperature Too High
The outlet water temperature spiked to an abnormally high level, a potential scalding condition, so the control shut down. Often a flow or sensor problem rather than a true overheat. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The outlet water temperature spiked to an abnormally high level, a potential scalding condition, so the control shut down. Often a flow or sensor problem rather than a true overheat.
Noritz fault codes can vary by model and series. Use this as a guide — the same code can have more than one cause. Our Technical Safety BC–licensed technicians read the code, confirm it against your unit's manual, and diagnose the true cause before any repair.
Likely causes of Noritz error 16
- Low or interrupted water flow during operation
- Scale buildup in the heat exchanger raising outlet temperature
- Faulty outlet temperature thermistor reading high
- Stuck or failing diverter / mixing valve on combi units
- Control board misreading temperature
What you can safely check
- Check the system pressure gauge is in the normal cold range
- Avoid using hot water until inspected if water runs dangerously hot
Beyond these checks, do not open the unit or touch gas/electrical parts — BC law requires a licensed gas fitter. Call us for a proper diagnosis.
Error 16 usually leaves you without heat or hot water and can indicate a safety-related fault. Don't keep resetting it — call for priority after-hours Noritz repair.
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Parts often behind Noritz error 16
Genuine Noritz parts we supply and professionally install — never for DIY.
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Noritz Error 16 Repair Across Metro Vancouver
Frequently Asked Questions
Fix Noritz Error 16 Today
Licensed Noritz diagnosis and repair with genuine parts — same-day and after-hours across Greater Vancouver.
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