45 🟡 Repair Required
Noritz Error Code 45: Water Leak Detected
⚠️ Your Noritz tankless water heater has detected a water leak. It's safe to use, but needs professional attention.
How to Fix Noritz Code 45
- Check all visible water supply pipes and connections for any signs of leaks or cracks.
- Inspect the water inlet and outlet valves for any signs of wear or damage.
- If you find a leak, turn off the water supply to that area and contact a professional immediately.
What Does Noritz Error Code 45 Mean?
When you see error code 45 on your Noritz tankless water heater, it means the unit has detected a water leak somewhere in the system. This could be due to a loose connection, a cracked pipe, or a faulty component. The heater has safely shut down to prevent further water damage. While it's still safe to use, it's important to have a professional inspect and repair the issue as soon as possible.
Common Causes of Noritz Code 45
- A loose or cracked water supply pipe
- A faulty water inlet or outlet valve
- A leak in the heat exchanger or other internal component
Applicable Noritz Models
Need a Pro to Fix Noritz Code 45?
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 45
Water Inlet Valve OEM: NOR-WIV-20
Water Outlet Valve OEM: NOR-WOV-20
Heat Exchanger