A smart water leak detector may not be the most exciting smart home device, but it is one of the most essential. These devices can protect your home from costly water damage and, in some cases, even help you save money on your homeowner's insurance policy. Water damage is one of the most common and expensive home repairs, often without warning. A recent study by Nationwide and Resideo underscores the importance of tech-enabled prevention tools like First Alert and Honeywell Home devices. The study reviewed 3.6 million policies and 86,000 smart home devices, revealing that customers using these tools experienced a $4,000 reduction in average claim costs due to fewer and less severe losses. Smart water leak detectors, like the First Alert L1 WiFi Water Leak and Freeze Detector, can provide timely alerts, helping homeowners address leaks before they escalate into disasters. In this review, I will explore this reliable device's features, benefits, and performance.

What is First Alert L1 WiFi Water Leak & Freeze Detector?

First Alert L1 WiFi Water Leak Detector and Freeze Detector unboxed GearBrain

The First Alert L1 WiFi Water Leak and Freeze Detector is a versatile and essential smart home device that helps safeguard your home against water damage, freezing temperatures, and high humidity levels. Designed for seamless integration with Resideo's Honeywell Home and First Alert branded smart devices, this detector provides real-time monitoring and alerts to ensure your home stays safe and comfortable.

Key Features:

• Comprehensive Detection: Monitors for water leaks, freezing temperatures, and humidity fluctuations, offering complete home protection.
• Smart Notifications: Sends mobile push and email alerts through the Resideo app, ensuring you're informed no matter where you are.
• Audible Alerts: The built-in alarm provides an immediate on-site warning for leaks or freezing conditions.
• Seamless Integration: Connects effortlessly to the Resideo app, allowing unified control with other Honeywell Home and Resideo smart devices, including thermostats and security cameras. It's also compatible with Amazon Alexa and Google Assistant-enabled devices.
• Battery Operated: Powered by two AA batteries, offering flexibility in placement without requiring an outlet.
• Flexible Placement: Features a 5-foot (1.5-meter) sensor cable for detecting leaks in hard-to-reach areas, such as under appliances or sinks.
• Wi-Fi Connectivity: Operates on a 2.4 GHz Wi-Fi network for reliable, real-time monitoring.

The First Alert L1 is more than just a leak detector—it's a smart addition to your home’s safety and comfort ecosystem. It can integrate with other Resideo and Honeywell Home devices, ensuring peace of mind by providing proactive alerts and control over your home's environment.

First Alert L1 Wi-Fi Water Leak and Freeze Detector (Cable not included)

List Price: $45.55

New From: $45.55in Stock

Used From: $41.01in Stock

How to Install and Use the First Alert L1 WiFi Water Leak and Freeze Detector

First Alert L1 Water Leak and Freeze Detector next to First Alert WLD3CABLE unboxedGearBrain

The First Alert L1 WiFi Water Leak and Freeze Detector is a smart, easy-to-use device that helps protect your home from water damage and freezing temperatures. Follow this step-by-step guide to set up and use your L1 detector effectively.

Installation Guide

What’s in the Box

Before starting, ensure you have all the necessary components:

• L1 Leak Detector
• Cable Sensor
• 2x AA Batteries
• User Manual
  You may also need a Phillips #2 screwdriver for mounting.

Step 1: Download the Resideo App

Use Resideo app to setup First Alert L1 Leak DetectorGearBrain

1. Download the Resideo app from Google Play (for Android) or the App Store (for iOS).
2. Create an account if you don’t already have one.

Step 2: Connect the L1 to Your Wi-Fi Network

1. Open the Resideo app and tap the "+" sign at the bottom of the screen.
2. Select "L1 WiFi Water Leak and Freeze Detector" from the list of devices.
3. Follow the in-app instructions to connect the L1 to your home Wi-Fi network.

Install batteries in L1GearBrain

Step 3: Install the Batteries

1. Insert the two AA batteries into the detector.
2. Look for a solid white LED on the device.
3. Press and hold the button for at least 5 seconds until the light turns blue and starts blinking.

The L1 detector should now appear in the Resideo app and be ready.

Placement Options

Depending on your needs, the L1 can be installed on the wall or placed on the floor.

• Wall Mounting:
  For extended reach, attach the included cable sensor. Remove the plug at the bottom of the L1 and insert the cable sensor.
• Floor Placement:
  The detector can function without the cable sensor. Place the device on the floor where leaks are likely to occur.

Note: The L1 is not designed to be submerged in water. For wider detection, consider the optional 5-foot (1.5-meter) First Alert WLD3CABLE, which acts as a sensor along its entire length.

Troubleshooting Tips

• If the device doesn’t power on, check the battery installation and ensure the batteries have sufficient power.
• If Bluetooth pairing fails, perform a factory reset:
  1. Press and hold the button for 15 seconds when the red LED is solid and you hear two beeps.
  2. The reset is complete when the LED turns off.

setup instructions in Resideo app for First Alert L1 leak detectorGearBrain

LED Indicator Guide

During Installation

• White (solid): The device is ready for Bluetooth pairing.
• No light: The device is off or lacks power.
• Blue (blinking): Bluetooth pairing mode.
• Blue (solid): Bluetooth pairing successful.
• Green (2 blinks): Successful connection.
• Green (3 blinks): Connection failed.

During Usage

• Red (blinking): Leak detected.
• Red (solid): Factory resetting process.
• White (blinking): The firmware update is in progress.
• Green (solid): The device is awake and connected.
• Yellow (blinking): Low battery.
• Off: Idle connection or no power.

With its easy setup, flexible placement options, and smart notifications via the Resideo app, the First Alert L1 WiFi Water Leak and Freeze Detector is a reliable solution for keeping your home safe from water damage and freezing temperatures.

Monitor humidity and temperature in Resideo appGearBrain

How much does First Alert L1 WiFi Water Leak & Freeze Detector cost?

The First Alert L1 WiFi Water Leak & Freeze Detector has a $59.99 MSRP and is available on the First Alert website, Amazon, The Home Depot, and other supply store sites. Also, the First Alert 5-Foot Cable Sensor for L1 Wi-Fi Water Leak and Freeze Detector costs only $14.99 and is available on Amazon, The Home Depot, and other First Alert retailers.

So, is $59.99 a reasonable price for a smart water leak and freeze detector? Yes, it is, especially one with WiFi connectivity, multi-sensor functionality (water, temperature, and humidity), and integration with a smart home ecosystem. Most smart water leak detectors range from $50 to $80, depending on the features offered, making this price point competitive.

Adding the WLD3CABLE for $14.99 brings the total to $74.98, which is still a good price for a smart water leak detection system with extended coverage. The cable extends detection capabilities and is particularly useful for larger or harder-to-reach areas, making the additional cost worthwhile. Considering the combined functionality and flexibility, this setup provides excellent value for homeowners looking to safeguard their property from water damage.

First Alert L1 Wi-Fi Water Leak and Freeze Detector (Cable not included)

List Price: $45.55

New From: $45.55in Stock

Used From: $41.01in Stock

How well did the First Alert L1 WiFi Water Leak & Freeze Detector perform during our testing?

First Alert L1 WiFi Water Leak Detector and WLD3CABLE installed on a basement floorGearBrain

Over the past three months, we tested the First Alert L1 WiFi Water Leak & Freeze Detector alongside the First Alert WLD3CABLE in our home. We placed the devices in our basement, a high-risk area for leaks due to pipes and our furnace's circulating hot water system. This space has experienced leaks in the past, making it an ideal testing ground. The L1 was impressively easy to install and offered substantial coverage with its included cable sensor and the optional WLD3CABLE, enhancing protection against water leaks and freezing pipes.

Integration with Resideo's Honeywell Home T9 smart thermostat was seamless, providing unified control for heating, cooling, and leak detection through the Resideo app. The app's interface made it convenient to monitor and manage multiple systems in one place. Voice integration with Alexa and Google Assistant was another highlight, enabling us to use simple voice commands to check on areas prone to leaks or cold temperatures. However, the L1's audible alert was only audible when we were in the basement, making the app notifications essential for timely alerts.

User Resideo app to control L1 leak detectorGearBrain

Battery life was another standout feature; after three months of continuous use, the L1 still had 99% battery life, showcasing its efficiency. During our initial testing, we simulated a leak by placing water on the floor, and the device worked flawlessly, immediately alerting us. Later, the L1 successfully detected an actual leak, sending a timely alert that allowed us to address the issue quickly.

While the L1 performed well, we noted a few areas for improvement. Integration with a smart water controller like Moen’s Flo or Phyn Plus would enhance its functionality, allowing users to automatically shut off the water supply in case of a major leak—an invaluable feature for homeowners who are away or managing second homes. Additionally, ensuring a stable Wi-Fi connection is critical for reliable performance. While we didn’t encounter connectivity issues during our testing, we noticed that poor Wi-Fi signal was a common concern in negative user reviews. A Wi-Fi extender may be necessary if your intended location has a weak signal.

Overall, the First Alert L1 WiFi Water Leak & Freeze Detector proved to be a reliable and easy-to-use device for monitoring potential leaks and freezing conditions. Its integration with Resideo's ecosystem, excellent battery life, and flexible coverage make it a strong choice for proactive home protection. However, smart water controller compatibility and Wi-Fi support enhancements could further elevate its utility.

Honeywell Home RCHT9510WF T9 Smart Thermostat + First Alert L1 Wi-Fi Water Leak and Freeze Detector

List Price: $224.55

New From: $224.55in Stock

Summary

In conclusion, the First Alert L1 WiFi Water Leak & Freeze Detector is a dependable and practical tool for safeguarding your home from water damage and freezing temperatures. Its ease of installation, seamless integration with Resideo’s ecosystem, and excellent battery life make it an appealing choice for homeowners seeking proactive protection. While adding a smart water controller integration and robust Wi-Fi connectivity would enhance its capabilities, the L1 still delivers reliable performance, effective alerts, and flexible placement options. Whether you’re managing a primary residence or a second home, this smart leak detector is a worthwhile investment for peace of mind and protection against costly water damage.

Pro

• Comprehensive Detection
• Seamless Integration (Works with the Resideo app, Honeywell Home devices, and voice assistants like Alexa and Google Assistant for unified smart home control.)
• Easy Installation
• Long Battery Life

• Audible Alert Limitation
• Wi-Fi Dependence
• No Automatic Water Shutoff
• Additional Cost for Expanded Coverage

Use our compatibility find engine to find, buy, and connect any smart device, including smart water leak detectors. You can also see which smart devices are compatible with your existing gadgets in your smart home.

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Honeywell Home RCHT9610WF T9 Smart Thermostat + First Alert L1 Wi-Fi Water Leak and Freeze Detector

List Price: $245.54

New From: $245.54in Stock

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