Water Leak Sensor Offline or Low Battery

Overview

Shipshape water leak sensors are your early warning system against one of the most damaging things that can happen to a home. They sit quietly in high-risk areas, like under your water heater, near your washing machine, or beneath bathroom sinks, waiting to detect even the smallest amount of moisture. When they find it, SAM alerts you immediately.

Because these sensors are battery powered, they do not need to be wired into your home's electrical system. That makes them easy to place anywhere. But it also means they need a fresh battery from time to time.

This guide covers what to do when your leak sensor shows a low battery warning or goes offline entirely.

Which Battery to Buy

Buy a CR14250 3V lithium battery. It fits both the Water Sensor 7 Pro and the Water Sensor 8. A CR2 3V also fits the 7 Pro. Read the code printed on the old battery first and buy that exact code.

Sensor Battery Life and Replacement is the full guide: both sensors side by side, the older 3.6V units, step-by-step pictures, and where to see battery level in the app. This page covers what to do when a leak sensor goes offline or will not come back.

• Battery life: about 3 years in a Water Sensor 7 Pro and up to about 2 years in a Water Sensor 8 (estimates). Cold spots, frequent reporting and frequent triggers shorten it.
• Not rechargeable: these are single-use lithium cells.

Low Battery Alert

When a sensor's battery starts running low, SAM will send you a notification in the app. Here is what to expect:

• The alert comes early. SAM notifies you while the sensor still has battery left. You do not need to rush, but do not ignore it either.
• The sensor continues monitoring. A low battery alert does not mean the sensor has stopped working. It is still detecting leaks and reporting data.
• Replace within a week or two. Wait much longer and the sensor may die without further warning.
• Check the level any time in the app: tap Manager, then Manage Network, then your gateway, then the sensor. More on finding it.

Why Your Leak Sensor Might Show Offline

If your leak sensor shows "Offline" in the app, or you get a "Sensor is Offline" alert, it could be one of several things:

• Dead battery. If the battery is fully depleted, the sensor cannot communicate at all. This is the most common cause of an offline leak sensor.
• Out of range. The sensor may be too far from the gateway or a Z-Wave repeater. This is more common in larger homes or when the sensor is in a remote location like a crawlspace.
• Gateway is offline. If your gateway is down, all sensors will appear offline. Check the gateway status first.
• Sensor malfunction. Rare, but possible. If a battery replacement and range check do not fix it, the sensor itself may need to be replaced.

Check the Sensor in the App

Before you go looking for the sensor, see what the app says about it:

1. In the Shipshape app, tap Appliances, then Devices at the top, then your leak sensor. It may be named Water Leak Detector.
2. If it reads Offline, look at its battery level:
   • 0%: the battery is dead. Replace it (next section).
   • Battery left: the sensor more likely lost its signal, which can drop it offline for a while. Check the gateway and range, as described in If the Sensor Does Not Come Back Online.

How to Replace the Battery

It takes about 2 minutes and no tools. Open the sensor, swap the battery with + matching +, close it, put it back with the probes facing down, then wake it with a wet fingertip on the probes. Sensor Battery Life and Replacement has every step with pictures. Aeotec's Water Sensor 7 Pro user guide has the manufacturer's own instructions.

Cannot find the sensor? Leak sensors usually sit on the floor under the water heater, behind the washing machine, under kitchen or bathroom sinks, near the sump pump, or by the HVAC condensate drain.

If the Sensor Does Not Come Back Online After Battery Replacement

Try these additional steps:

1. Remove and reinsert the battery. Sometimes the contacts do not make a clean connection on the first try. Take the battery out, wait 1 to 2 minutes, and put it back in.

2. Check the battery orientation. Confirm the positive and negative ends are correct. An upside-down battery will not damage the sensor, but it will not power it either.

3. Verify the battery is fresh. If the battery came from a drawer or has been sitting around for years, it may already be partially depleted. Try a brand-new battery from a sealed package.

4. Check the gateway. If the gateway is offline, the sensor cannot report in even with a fresh battery. Confirm the gateway shows online in the app.

5. Check range. If the sensor is far from the gateway (especially through multiple walls or floors), it may not have enough signal strength. Move the sensor closer to the gateway temporarily to test. If it connects when closer, you may need a Z-Wave range extender near the sensor's intended location.

6. Contact support. If none of the above resolves the issue, the sensor may need to be replaced. Shipshape support can verify the sensor's status remotely and arrange a replacement if necessary.

Tips for Getting the Most From Your Leak Sensors

• Keep the right spares on hand. Buy a 2-pack or 4-pack and store them with your household supplies. When SAM sends a low battery alert, you can replace it the same day instead of waiting for a store trip.
• Check sensor placement during cleaning. When you clean under the sink or behind the washing machine, make sure the sensor has not been bumped out of position. The moisture contacts need to be in contact with the surface to detect leaks.
• Do not submerge the sensor. Leak sensors are designed to detect moisture on their contact points, not to survive being submerged in standing water. If you find your sensor sitting in a puddle, dry it off thoroughly after addressing the leak.
• Replace batteries proactively. If you know a battery has been in service for 18 months or more and you are heading into a season when you will be away from home (vacation, snowbird travel), swap it out early for peace of mind.

When to Contact Support

Contact Shipshape support if:

• The sensor remains offline after a fresh battery and the gateway is confirmed online.
• The sensor shows online but the battery level reads critically low immediately after replacement.
• You notice physical damage to the sensor (cracked housing, corroded battery contacts).
• You are unsure where the sensor is located in your home. Support or your service professional can help you find it.