The shut-off valve on my water leak detector won't cut off the water anymore
Home Nura guide — category: Water Leak Detectors
Diagnosis
Warning: this symptom can point to a serious hardware defect. Stop using the device until the cause is found. We recommend contacting the manufacturer or an authorized repair centre before you try to use it again.
Recommended steps
Unplug it right away and stop using the device. Document the symptom (photos, video, sounds), then contact the manufacturer's support. If the device is still under warranty, keep your proof of purchase handy: this kind of failure is exactly what the warranty is for.
Repair or replace?
If the problem persists after these checks and the appliance is no longer under warranty, compare the repair estimate with the cost of a new model.
If you decide to replace it
Water Leak Detectors: the shortlist from our buying guide
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Best overall
Aqara Water Leak Sensor T1
A compact IP67 Zigbee sensor to place under every at-risk appliance, with smartphone alerts and a CR2032 cell lasting around two years.
Photo: © Aqara
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Best without a hub
Shelly Flood Gen4
Works over Wi-Fi with no hub, supports Matter, and has a built-in buzzer plus an extendable 2 m sensing cable to cover a whole area.
Photo: © Shelly (Allterco Robotics)
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Best for automatic shut-off
Aqara Valve Controller T1
Clamps onto an existing quarter-turn valve (DN15 to DN25, or ½ to 1 in.) and closes it automatically as soon as an Aqara sensor detects a leak.
Photo: © Aqara
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Other common problems in this category
These issues affect the same type of appliance — each one comes with a diagnosis and the recommended steps.
- Water Leak DetectorsMy water leak detector keeps triggering false alarms
- Water Leak DetectorsHow long does the battery of a water leak detector last?
- Water Leak DetectorsMy water leak detector no longer triggers the audible alarm despite water being present
- Water Leak DetectorsMy water leak detector sends the notification with a delay of several minutes
Frequently asked questions
Usually, yes, if the failure shows up during the warranty period and isn't caused by misuse. A product in the Water Leak Detectors category bought new from an authorized retailer normally comes with a manufacturer's warranty: check its length in the manual or on the brand's website. Consumer protection rules also vary by province and territory, so keep your proof of purchase.
If you're still within the store's return window, a return or exchange is usually the fastest fix. After that, the manufacturer's warranty takes over: its customer support can arrange a repair or a replacement. Even outside the warranty, the manufacturer can often repair the device for a fee. Either way, keep your proof of purchase.
Our public methodology lowers the Nura Score /10 of any model in the Water Leak Detectors category whose recurring failures are documented in owner reviews. A model that breaks down too often never tops our rankings, whatever the brand.
Generally, yes. Routine maintenance, such as cleaning, replacing a gasket or recalibrating, is part of normal use and doesn't usually affect your warranty. Irreversible changes to the hardware are what can cause problems. For a product in the Water Leak Detectors category, stick to the steps described in the manufacturer's manual and read the warranty terms before going any further.
When a product fails in its first few months of normal use, the cause is usually a manufacturing defect. Contact the seller or the manufacturer with your proof of purchase and a description of the symptom: for a model in the Water Leak Detectors category that is still under warranty, this is the typical case for a free repair or replacement. Warranty terms vary by brand, so read yours.