8 SimpliSafe Entry Sensor Problems Troubleshooting (Solved) (2024)

It may be annoying to deal with issues with home security systems, especially when you have no idea what the problem is or why it is happening. This is mainly the case when the system is a SimpliSafe security system, one of the most reliable.

Are you experiencing an issue with your SimpliSafe Entry Sensor? Don’t panic. In this article, we’ll walk you through seven of the most common problems and how you can solve them.

8 SimpliSafe Entry Sensor Problems Troubleshooting (Solved) (1)

Table of Contents

  1. SimpliSafe Entry Sensor Keeps Going Offline
    • Your sensor's battery is drained.
    • Interference Issues
    • Lack of Contact with the Base Station
  2. SimpliSafe Entry Sensor Not Chiming
    • Your Chime setting has been toggled to OFF.
    • Sensor placement
  3. SimpliSafe Door Sensor Not Chiming
  4. SimpliSafe Entry Sensor Not Working After Battery Replacement
    • You Have the Wrong Batteries or Inserted Them Wrongly
    • Poor connections with the base station
    • You need to Reset the Sensor.
  5. What to Do if a SimpliSafe Sensor Is Not Responding
  6. SimpliSafe Not Detecting Entry Sensor
    • Incorrect Sensor Placement
    • Interference
    • Faulty Sensor or Base Station
  7. Do Simplisafe Sensors Fall Off
  8. Summary

SimpliSafe Entry Sensor Keeps Going Offline

If your SimpliSafe Entry Sensor keeps going offline or displaying an offline status on the SimpliSafe Mobile App, the most likely reasons are below.

Your sensor’s battery is drained.

Your SimpliSafe Entry Sensor showing as offline could be caused by the drained sensor’s battery. The sensor relies on power from its internal battery to function correctly.

A simple battery replacement might be the solution. Follow these stepsto get your sensor back online:

  • Slide the sensor up and off its bracket.
  • Replace the lithium battery.The Entry Sensor uses a single (1) CR-2032 Lithium 3V battery, which can last up to 5 years, depending on usage and placement.
  • Then, Slide the sensor back onto its bracket.

After battery replacement, the error may take up to 24 hours to clear from the SimpliSafeMobile App.

However, to bypass the time frame, follow these steps to place your system into Test Mode using the keyboard.

  • Go to menu Menu > Enter your Primary PIN > Test Mode.
  • Press and release the button on the Entry Sensor. The Base Station should announce “Entry Sensor,” and the app timeline should show “Entry Sensor Test.”

If Test Mode doesn’t work, the sensor may have been offline for an extended period. To fix this, you can remove and re-add the sensor.

To remove your SimpliSafe Entry Sensor, follow these steps:

  1. Open the SimpliSafe mobile app on your phone or tablet.
  2. Choose “My System” from the bottom navigation bar.
  3. Select “Device Settings.”
  4. Tap on the specific sensor you wish to remove.
  5. Choose the option labeled ‘Remove Device.’

To re-add it, follow these step-by-step instructions:

  1. Open the three-bar menu (≡) in the SimpliSafe app.
  2. Select “My System.”
  3. Go to “Device Settings” and tap the + symbol on the top right.
  4. Confirm the prompt: “System Will Be Disarmed. Continue?” by selecting “Yes.”
  5. You’ll now see “What are you setting up?” indicating that your Base Station is in “Setup Mode.”
  6. Remove the battery tab and Press the Setup Button on the physical entry sensor.
  7. You’ll know it worked when the Base Station says, “Entry Sensor added.”
  8. Back on the app, select “Name the device.”
  9. Choose names for different sensors, especially if they’re in the same room.
  10. Scroll to the bottom for the option to set a Custom Name.
  11. Hit “Next,” and you’ll be returned to the Setup page.

By following these steps, you can successfully reinstall your SimpliSafe Entry Sensor.

Interference Issues

If your SimpliSafe Entry Sensor keeps going offline, the issue may be related to interference.

Your SimpliSafe Base Station typically has a 400-foot range for sensors.

However, walls or large solid objects, as well as electronic interference from other wireless devices, can reduce this range.

Dense objects obstructing the signal path between the sensor and the Base Station, such as furniture or appliances, could significantly reduce the base station’s ability to connect to your sensors.

There is also the matter of electronic interference. Other nearby wireless devices, such as remote-controlled garage door openers or wireless weather stations, might also compete for the same airspace, leading to interference.

You only need to reposition the sensor for a clear line of sight and remove potential obstructions like new furniture or appliances.

Lack of Contact with the Base Station

Your SimpliSafe system is designed to trigger an alarm every time a sensor loses connection with your base station for over 24 hours. If this happens, the sensor that lost connection with the base station could appear offline on the app, even if the sensor’s batteries aren’t dead.

One of the most common reasons this could happen is if you relocated your base station to the sensor or both.

SimpliSafe Entry Sensor Not Chiming

When your SimpliSafe system is disarmed, and an Entry Sensor is opened, a chime is triggered at the Base Station. This chime serves as a notification, alerting you to the potential intrusion or the opening of a monitored entry point in your home.

It’s a feature to keep you informed about activity even when the system is not actively armed.

If your SimpliSafe entry sensor is not working, here are some potential reasons why.

Your Chime setting has been toggled to OFF.

You can quickly turn it on and adjust it to MEDIUM or HIGH using the SimpliSafe Mobile App, Web App, or Keypad.

On the SimpliSafe Mobile App, follow these steps

  • Open the SimpliSafe® app on your phone or tablet.
  • Select “My System” from the bottom navigation bar.
  • Go to “Base Station Settings.”
  • Scroll to “Entry Sensor Chime.”
  • Adjust the volume using the slider.
  • Click “Save” in the upper right corner before exiting.

On Keypad

  • Press “Menu” on your Keypad.
  • Enter your Primary PIN.
  • Choose “System Settings.”
  • Select “Chime Volume” and adjust as needed.

On Web App:

  • Log in to the Web App.
  • Select “System” from the left-hand navigation bar.
  • Under “Additional Settings,” find “Entry Sensor Chime.”
  • Use the drop-down menu to adjust the volume.
  • Click “Save Changes” at the bottom of the screen before exiting.

Sensor placement

Sensor placement is crucial for entry sensors in a security system like SimpliSafe to function adequately. The position of the sensor relative to its corresponding magnet and the monitored entry point (e.g., door or window) can impact the system’s performance.

Ensure the Entry Sensor is correctly aligned with the magnet when the door or window is closed.

Confirm no obstacles or misalignments are affecting the sensor’s functionality.

Also, consider restarting your SimpliSafe system by unplugging the unit, removing and reinstalling the rechargeable batteries, and allowing it to reboot.

If challenges persist, don’t hesitate to seek support from SimpliSafe for further assistance.

SimpliSafe Door Sensor Not Chiming

Since the SimpliSafe Door Sensor and Entry Sensor are the same things,if your SimpliSafe Door Sensor isn’t chiming, the solutions presented in the “SimpliSafe Entry Sensor Not Chiming” section would solve this issue as well.

SimpliSafe Entry Sensor Not Working After Battery Replacement

If your SimpliSafe Entry sensor isn’t working even after battery replacement, there are other reasons.

You Have the Wrong Batteries or Inserted Them Wrongly

Suppose your sensor stops working immediately after you replace its battery. In that case, you probably have the wrong type of battery or have inserted it incorrectly.

SimpliSafe entry sensorsuse a single (1) CR-2032 Lithium 3V battery.

Poor connections with the base station

Suppose your SimpliSafe entry sensor does not respond or work after the battery change. In that case, it might be due to faulty connections with the base station.

Check for physical obstacles like walls or heavy appliances, and look for sources of wireless interference such as remote-controlled garage door openers, wireless weather stations, or baby monitors.

Once interference sources are identified, work on minimizing their impact by repositioning the base station or sensor to minimize obstacles. Adjust frequencies or relocate other wireless devices to reduce interference.

Addressing these will help ensure that the connections between the entry sensor and the base station are secure and interference is minimized, improving overall system performance.

You need to Reset the Sensor.

Resetting your SimpliSafe Sensor is one of the surest ways to fix minor issues with the device.

If you recently replaced the batteries in your sensor and the device suddenly stops working, try resetting your sensor.

Here is how you can do that:

  • Unplug the Base Station
  • Using a screwdriver, open the battery cover on the entry sensor.
  • Remove the battery for about 15 seconds, then re-insert and secure the cover.
  • Tap the reset button on the sensor for at least 10 seconds until you hear the indicating beep tone.

If the issue persists, conduct a test by opening the door to see if the sensor triggers the alarm. If it fails to do so, the sensor may be defective and needs replacement.

What to Do if a SimpliSafe Sensor Is Not Responding

When a SimpliSafe sensor is Not Responding, the issue may stem from a battery problem or a weak connection. Follow these steps to solve the issues

1. Replace Batteries:

Begin by replacing the sensors’ batteries.The Entry Sensor uses a single (1) CR-2032 Lithium 3V battery, which can last up to 5 years, depending on usage and placement.

If you have the wrong batteries, your sensor won’t work.

Even if you have suitable batteries, your base station will still not work if you insert them incorrectly.

Make sure to insert the battery with the positive side facing up towards you.

2. Check for Weak Connections:

If battery replacement doesn’t solve the problem, sensors and the Base Station may have a weak connection.

Interference, like thick walls or construction materials, can cause this issue.

It’s advisable to position your Base Station centrally, elevated at least 3 feet on a non-dense surface like glass or wood. Maintain 3-5 feet from other wireless devices to prevent signal interference for optimal performance.

SimpliSafe Not Detecting Entry Sensor

Several factors could contribute to the issue if your SimpliSafe system is not detecting an entry sensor. Consider the following reasons and corresponding steps to solve them:

Incorrect Sensor Placement

  • Ensure the entry sensor is correctly aligned with its magnet and is positioned near the monitored entry point.
  • Misalignments or placement issues can affect the sensor’s ability to detect status changes.


  • Identify potential sources of interference, such as physical obstacles, walls, or other electronic devices.
  • Interference can disrupt communication between the entry sensor and the Base Station.

Faulty Sensor or Base Station

  • In rare cases, the entry sensor or Base Station may be defective. Contact SimpliSafe customer support for professional assistance and potential replacement.

If issues persist, consider resetting the entry sensor by unplugging the Base Station, removing the battery, and restarting the system. Resets can resolve potential glitches or communication errors.

Do Simplisafe Sensors Fall Off

Yes, they do, but it’s preventable.

To prevent SimpliSafe Sensors from falling off, consider cleaning the surface before attaching, avoid direct sunlight exposure, and opt for reliable, double-sided, reusable nano tape.

These precautions can help enhance the tape’s adhesive properties and secure the sensors effectively.


So there you have it: seven of the most common SimpliSafe Entry Sensor issues explained and solved. If any of these issues affect your SimpliSafe entry sensor, the solutions, tips, and suggestions in this article should help you get it back on track.

Are you having trouble solving any of these issues? If so, contact SimpliSafe Support for any additional help you need.

Do you know any other solution to fix the issues listed above? Feel free to share it with us. We look forward to hearing from you.

8 SimpliSafe Entry Sensor Problems Troubleshooting (Solved) (2)

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8 SimpliSafe Entry Sensor Problems Troubleshooting (Solved) (2024)


Why is the SimpliSafe entry sensor not responding? ›

An Entry Sensor Not Responding message could be due to a few different things. A new battery could be needed, but it could also be that the Entry Sensor and Base Station are too far away.

How do you reset the entry sensor on SimpliSafe? ›

Slide the sensor off of the bracket by pushing it toward the door or window frame, then up toward the setup button. Using a pen, press the groove of the battery tab in and up to remove the battery from the sensor. Wait at least 15 seconds, then insert the new battery. Slide the Entry Sensor back onto its bracket.

How do I fix my SimpliSafe offline entry sensor? ›

If your Entry Sensor is showing as offline on the SimpliSafe® Mobile App, this is an indicator that the battery within the device needs to be replaced. The Entry Sensor takes a single (1) CR-2032 Lithium 3V battery and has a life expectancy of up to 5 years depending on placement and usage.

Why does my SimpliSafe entry sensor keep disconnecting? ›

But more often than not, the issue is with interference. Something is literally getting in the way of the signal. It could either be a dense physical object (brick walls, big metal appliances, etc.) or another wireless signal drowning out your sensors (e.g. a wireless garage door opener, baby monitor, etc.).

How do you test a SimpliSafe entry sensor? ›

To test your Entry Sensor, open and close protected doors and windows. The Base Station will announce “Entry Sensor” if the test was successful. You can also press the button on the top of the Entry Sensor to test the sensor's functionality.

Why do sensors stop working? ›

Dust, other contaminants, vibrations, shocks and exposure to high temperatures all have a shortening effect on the average lifespan of a sensor, so it is important to look for a solution that overcomes these problems by design, rather than just accepting frequent sensor failure and replacement as part and parcel of ...

How long do SimpliSafe entry sensors last? ›

The expected lifetime of the Entry Sensor's battery is up to 10 years, but that may vary depending on how frequently the sensor is used.

Why is my wireless door sensor not working? ›

If your door sensor is wireless, a dead battery may be the reason your door sensor is no longer working. Many panels will notify you if the battery in your wireless door sensor is running low so that you can replace it before it fails.

Why is my SimpliSafe temperature sensor not responding? ›

The warning 'Sensor Not Responding' for a Temperature Sensor can be caused by a couple of things, including a low battery or a weak connection between the device and the Base Station. As a first step, we'd recommend ensuring that the battery is correctly installed.

Can SimpliSafe sensors be jammed? ›

In early 2022, Consumer Reports conducted an in-depth test of 10 major DIY home security systems and found that half, including Abode, Cove, Ring, SimpliSafe, and DIY camera system Eufy were jammable using relatively inexpensive jamming equipment.

Why is my SimpliSafe water sensor not responding after battery change? ›

Is your Water Sensor still offline after replacing the battery? If the sensor does not come back online after changing the battery, it's possible that your sensor has been offline for too long. The best step would be to remove the sensor from the SimpliSafe® Mobile App and then add it back to your system.

Why is my sensor offline? ›

There are three reasons why a sensor could be offline. The first and most common reason is a low or empty battery of the sensor. The second reason is that the sensor is not connecting to the network and the third is that the sensor is damaged.

How do I stop my door sensor from going off? ›

Once you've verified that there is no intrusion or threat, clean your device and make sure the sensor and magnet are aligned and that they haven't been altered. After you've cleaned and checked the alignment of your door sensors, reset the door sensor and see if the alarm stops.

Why does my sensor alarm keep going off? ›

The problem could be as simple as a low or dead battery in one of your sensors, which can trigger burglar and smoke alarms. Pets could also be the culprit — if your sensors aren't calibrated properly or don't have advanced pet detection features.

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