65 🟡 Repair Required
Noritz Error Code 65: Main Flow Control Valve Abnormality
⚠️ Your Noritz water heater is experiencing an issue with its main flow control valve. It's safe to use, but needs professional attention.
How to Fix Noritz Code 65
- Check if the error code is still displayed after turning the unit off and then back on again
- If the code persists, turn off the water heater and contact a licensed HVAC technician for repair
- Do not attempt to open the unit or repair the flow control valve yourself, as this can void the warranty and may cause safety hazards
What Does Noritz Error Code 65 Mean?
The Noritz 65 error code indicates an abnormality with the main flow control valve in your tankless water heater. This valve regulates the flow of water through the system. When it's not working properly, your water heater may not function as efficiently as it should. The error code is displayed on the control panel, and the unit will operate at a reduced capacity until the issue is resolved.
Common Causes of Noritz Code 65
- Wiring or electrical issues related to the flow control valve
- Malfunctioning flow control valve itself
- Clogging or scaling in the valve due to hard water or lack of maintenance
- Incorrect water pressure settings
Applicable Noritz Models
Need a Pro to Fix Noritz Code 65?
A licensed HVAC technician can diagnose and fix this issue quickly.
Find a Licensed Tech Near You →Replacement Parts for Noritz Tankless Water Heater Code 65
Flow Control Valve OEM: NOR-123456