Noritz Error 45: Internal Water Leak Detected
A water leak sensor at the bottom of the unit (behind the circuit board) detected accumulated water, indicating a possible internal leak. Documented specifically for NRCP, CB, and combi/boiler models (e.g. CB180-DV, CB199-DV, NRCP98/111). We diagnose and repair it across Greater Vancouver — same-day and after-hours.
A water leak sensor at the bottom of the unit (behind the circuit board) detected accumulated water, indicating a possible internal leak. Documented specifically for NRCP, CB, and combi/boiler models (e.g. CB180-DV, CB199-DV, NRCP98/111).
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 45
- Internal leak from a fitting, heat exchanger, or pump seal
- Condensation pooling in the sensor well from temperature differences
- Loose or weeping plumbing connection inside the cabinet
- Failed component dripping onto the leak sensor
- Wet leak sensor from a prior event not dried out
What you can safely check
- Look underneath and around the unit for visible water or drips
- Check the system pressure gauge isn't dropping, which can hint at a leak
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.
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For your safety and to keep your manufacturer warranty valid, BoilerPart.ca does not sell loose boiler parts over the counter or for self-installation. Under BC regulations, gas appliance components must be installed by a licensed gas fitter. Every part we source is genuine OEM and is professionally fitted, tested, and certified by our Technical Safety BC–licensed technicians as part of a complete repair or installation.
Parts often behind Noritz error 45
Genuine Noritz parts we supply and professionally install — never for DIY.
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Noritz Error 45 Repair Across Metro Vancouver
Related Noritz Water & Flow Codes
Frequently Asked Questions
Fix Noritz Error 45 Today
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