65
Noritz
Flow Control Valve / Bypass Valve Fault
Error code 65 displayed; unit may not operate correctly in recirculation or may shut down.
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Safety Warning
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.
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Possible Causes
Stuck flow control valve, Debris in bypass valve, Faulty flow control motor, Wiring fault to flow control assembly
How to Fix / Troubleshooting
Safety first: Turn OFF power and gas. Close water isolation valves before removing any water-side components.
Steps to check and correct:
- Clean inlet filter: Sediment can cause the flow control valve to stick. Remove and clean the inlet water filter screen.
- Cycle power: After cleaning, restore power and run water to see if the valve frees itself.
- Inspect wiring: Locate the flow control valve motor and check its wiring harness for damage or loose connections.
- Professional service: If error 65 continues, the flow control valve assembly may need to be removed, cleaned, or replaced by a Noritz technician.
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Repair Difficulty
Hard
4/5
Required Part
Flow Control Valve Assembly
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