Noritz Error 57: Low Incoming Water Pressure
The unit sensed that the incoming (supply) water pressure is too low for proper operation, so it will not run normally. Distinct from code 54 which is heating-loop pressure. We diagnose and repair it across Greater Vancouver — same-day and after-hours.
The unit sensed that the incoming (supply) water pressure is too low for proper operation, so it will not run normally. Distinct from code 54 which is heating-loop pressure.
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 57
- Faulty or out-of-range water pressure sensor
- Clogged inlet water filter / screen
- Partially closed supply valve to the unit
- Low municipal/well water pressure to the home
- Air in the system or sediment restricting flow
What you can safely check
- Confirm the cold water supply valve to the unit is fully open
- Check the system pressure gauge for an abnormally low reading
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 57 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 57
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Noritz Error 57 Repair Across Metro Vancouver
Related Noritz Water & Flow Codes
Frequently Asked Questions
Fix Noritz Error 57 Today
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