Home-How » Schlage Lock Blinking Red (Causes & Solutions)

Schlage Lock Blinking Red (Causes & Solutions)

You walk up to your front door, ready to head inside after a long day at work. But when you try to unlock it, you realize your Schlage lock is blinking red. What do you do?

Don’t worry; we’re here to help. Below are a few possible solutions for what to do with your Schlage lock blinking red. Remember that these solutions are only meant as a starting point—if none work, be sure to reach out to a professional locksmith for assistance.

Schlage Lock Blinking Red: Common Causes

If you’re experiencing this issue, please don’t try to force the lock open. This can damage the lock and make it even more difficult to clear. Instead, check one of the following troubleshooting methods to clear the lock:

1. Check the batteries.

The first step in troubleshooting red light blinks on a Schlage lock is to check the batteries.

According to the Upgraded Home website, the constant blinking means the battery is already dead and needs replacing. A flashing red followed by green light and beeps indicates low battery power and will have to be replaced with new ones soon.

To replace them:

  • Turn your lock around so that you can see the back of it.
  • You should see two screws on the battery tray; remove them with a screwdriver.
  • Open up the battery cover to reveal the alkaline batteries. It could be one 9-volt battery, 4 AA, or 2 AAA batteries.
  • Remove and replace these old batteries with new ones.
  • When you’re done, close up the cover and secure it with your screws.

2. Check the lock’s firmware.

It’s also important to verify that the firmware of your lock is current. Schlage occasionally releases updates to address issues and enhance the performance of its locks. The firmware version can be checked via the Schlage Sense app or by following the lock’s user guide.

To ensure proper operation, be sure to install any available updates. To update the firmware for a Schlage smart lock, first, download the Allegion Engage App to your mobile device.

  • Log in with the Homebase Team> select property name on Sites > select the unit
  • Wait for the Connectedbanner > Update Firmware (follow the steps on the screen)
  • Once complete, close the app and open the Homebase Mobile Manager to perform lock maintenance.
Check the door's alignment
Image Credit: wearemore.solutions

3. Check the door’s alignment.

Another solution to consider when dealing with a blinking red light on a Schlage lock is to check the door’s alignment. If the door is not properly aligned with the lock, the lock may not function correctly, and the red light may blink. To check the alignment, ensure the door is closed correctly and then turn the thumb turn or use a key to lock and unlock the deadbolt.

If the lock is not aligned perfectly, use a screwdriver to adjust the screws on the lock’s mounting plate to align the lock with the door.

4. Keep the lock clean.

In addition to the above solutions, keeping the lock clean is also a good idea. Dust and debris can accumulate on the lock over time and can cause the lock to malfunction. Clean the lock with mild liquid dishwashing soap and dry cloth to remove any dust or debris preventing the lock from functioning correctly.

5. Check for the key.

Another tip is to ensure that the lock is not being used with a worn-out or damaged key. A worn or damaged key can cause the lock to malfunction, and the red light may blink. If you suspect that the key may be the problem, try using a different key or have the key re-cut by a locksmith.

6. Check for loose wiring.

Sometimes, the wires that connect the lock to the power source may become loose or disconnected, causing the lock to malfunction and the red light to blink. To check for loose wires, locate the wires that connect the lock to the power source, such as the batteries or the wiring for a smart home system.

Check for loose wiring
Image Credit: liliwisesmartdoorlock

Ensure the connections are secure and the wires are not frayed or damaged. If the wires appear loose or damaged, try tightening the connections or replacing the cables as necessary. If you are uncomfortable working with wires, it’s best to call a professional to look at it.

7. Maximized user code reached.

Each Schlage lock model has a different maximum number of codes that can be programmed. Suppose you try to add a new user code, but the lock is already at the maximum number, or you input the wrong user code. In that case, the red light will blink to indicate that the lock cannot accept any more codes.

To resolve this problem, you can remove one or more existing user codes in order to accommodate the new and correct user code. This can be done either by utilizing the master code or following the steps outlined in the user manual for your lock model. It is also recommended to periodically review and delete any no longer necessary codes.

8. Problem with the lock’s connectivity.

Schlage locks have built-in WiFi, so they can connect directly to your smart home. If the red light on the lock is blinking, there may be a connectivity issue.

To troubleshoot this issue, check the network’s settings and ensure that the lock is paired correctly and connected to the network. Ensure that the network is functioning properly and that no other devices are interfering with the connection.

Problem with the lock's connectivity
Image Credit: strandsecurity

9. Error in programming.

A blinking red light on a Schlage lock can also indicate an error in programming, which can happen when technology changes occur. You must also input an access code that is the same as your user program code. To fix this issue, delete the existing user code to add a new one. Make sure you have entered the same code twice.

10. Perform a manual reset.

If all else fails and your Schlage lock is still blinking red and not responding, you may need to return it to its factory default setting. Here’s a video from the official account of the Schlage lock manufacturer. Once your Schlage lock has been reset, you can change the programming code with a new programming code and try troubleshooting the issue again.

If this doesn’t work, you may need to contact a locksmith or repair service for further assistance. It’s also important to note that if the lock is still blinking red even after trying all of these troubleshooting steps, it may indicate a more serious problem. It’s best to contact Schlage customer support for further assistance.

In addition, Schlage locks come in different models; some of them are equipped with a keypad, some others with a smart-home integration, and some others with a traditional key. It’s important to check the user manual and identify your type of lock, as the troubleshooting steps might vary.

How to Reset Schlage Lock Blinking Red

If your Schlage deadbolt is blinking red, it means the battery is low and needs to be replaced. To factory reset the lock, follow these simple steps:

  1. Take out the Schlage Locks keypad battery
  2. Press the Schlage Button at the top of the lock for at least 10- 15 seconds.
  3. Simultaneously return the batteries while you are pressing the button.
  4. If this is successful, you should hear a beep and see a light green on the Schlage keypad lock.

Note: Resetting the Schlage lock will erase all stored codes, so make sure you remember important codes or keep a backup list of them.


Q1: Can a Schlage lock malfunction due to weather changes?

Yes, extreme temperatures and humidity can affect the performance of a Schlage lock; it’s recommended to check the lock’s performance during these conditions and to lubricate the lock to prevent sticking or freezing.

Q2: Can I change the settings of my Schlage lock remotely?

It depends on the model of the lock; some Schlage locks are equipped with smart-home integration and can be controlled through an app or a smart home hub, while others have a keypad that allows you to change the settings locally.

Q3: Can I install a Schlage lock by myself?

Yes, most Schlage locks come with easy-to-follow instructions and can be installed by most homeowners with basic DIY skills. However, if you are not comfortable working with tools or you have any doubts, it’s always best to call a professional.

Q4: Does Schlage lock have a warranty?

Yes, Schlage locks come with a limited warranty; the terms and conditions of the warranty may vary depending on the model of the lock and the date of purchase; you can check the user manual or contact customer support for further information.


A blinking red light on a Schlage lock can be a frustrating issue to deal with, but it can often be resolved by troubleshooting the problem and addressing the root cause.

Hopefully, our solutions above helped you fix the problem. But if you’re still experiencing the issue, it’s always best to consult the user manual or contact customer support for further assistance. They can provide additional troubleshooting steps or check if the lock is under warranty and provide you with a replacement or repair if it’s the case.

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