Noritz Abnormal Internal Temperature / Overheat Protection

Error code 95 appears; unit may not operate.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Blocked airflow around unit, High ambient temperature, Scale buildup in heat exchanger, Faulty temperature sensor or PCB

Safety first: Turn OFF power and gas. Allow the unit to cool.

Steps to check and correct:

Check installation clearances: Ensure the Noritz heater has the required clearances from walls and other equipment for proper cooling.
Inspect for dust buildup: Clean dust from around the unit, fan intake, and internal components using a vacuum and soft brush.
Descale heat exchanger: Perform a descaling flush to improve heat transfer.
Reset and test: Restore power and gas. If error 95 continues, a technician should test sensors and PCB.

Medium 3/5

Heat Exchanger

Check Price on Amazon

We may earn a commission from links on this page.