You approach the front door, ready to walk in after a long day at work. But when you try to unlock it, you realize that your Schlage lock is flashing red. What are you doing?
Do not worry; we are here to help. Below are some possible solutions for what to do with your Schlage lock flashing red. Remember that these solutions are only meant as a starting point – if none of them work, be sure to contact a professional locksmith for assistance.
Schlage Lock Flashing Red: Common Causes
If you experience this problem, please do not try to force the lock. This can damage the lock and make it even more difficult to delete. Instead, check one of the following troubleshooting methods to clear the lock:
1. Check the batteries.
The first step in troubleshooting a flashing red light on a Schlage lock is to check the batteries.
According to the Upgraded Home website, constant blinking means the battery is already dead and needs to be replaced. A flashing red followed by a green light and beeps indicates a low battery power and will need to be replaced with new ones soon.
To replace them:
- Turn the lock over so you can see the back.
- You should see two screws on the battery tray; remove them with a screwdriver.
- Open the battery cover to reveal the alkaline batteries. It can be a 9 volt battery, 4 AA batteries or 2 AAA batteries.
- Remove and replace these old batteries with new ones.
- When finished, close the cover and secure it with the screws.
2. Check the firmware of the lock.
It’s also important to check that your lock’s firmware is up-to-date. Schlage occasionally releases updates to fix problems and improve the performance of its locks. The firmware version can be checked through the Schlage Sense app or by following the lock’s user guide.
To ensure proper operation, be sure to install all available updates. To update the firmware for a Schlage smart lock, first download the Allegion Engage app to your mobile device.
- Connect with The core team> select property name on Sites > select the drive
- Wait for Logged inbanner > Update the firmware (follow the steps on the screen)
- Once done, close the app and open Homebase Mobile Manager to perform lock maintenance.

3. Check the door alignment.
Another solution to consider when dealing with a flashing red light on a Schlage lock is to check the alignment of the door. If the door is not properly aligned with the lock, the lock may not work properly and the red light may flash. To check alignment, make sure the door is closed properly and then turn the thumb turn or use a wrench to lock and unlock the latch.
If the lock is not perfectly aligned, use a screwdriver to adjust the screws on the frog mounting plate to align the lock with the door.
4. Keep the lock clean.
In addition to the solutions above, keeping your lock clean is also a good idea. Dust and debris can build up on the lock over time and cause the latch to malfunction. Clean the lock with mild liquid dish soap and a dry cloth to remove any dust or debris that prevents the lock from working properly.
5. Check the key.
Another tip is to make sure the lock is not used with a worn or damaged key. A worn or damaged key can cause the lock to malfunction and the red light to flash. If you suspect the key might be the problem, try using a different key or have the key cut again by a locksmith.
6. Check for loose cables.
Sometimes the wires connecting the lock to the power source can become loose or disconnected, causing the lock to malfunction and the red light to flash. To check for loose wires, locate the wires that connect the lock to a power source, such as batteries or cables for a smart home system.

Make sure the connections are secure and the wires are not frayed or damaged. If the wires appear loose or damaged, try tightening the connections or replace the cables as necessary. If you are not comfortable working with wires, it is best to call a professional to examine it.
7. Maximum user code reached.
Each Schlage lock model has a different maximum number of codes that can be programmed. Let’s say you try to add a new user code, but the lockout is already at the maximum number, or you entered the wrong user code. In this case, the red light will flash to indicate that the lock cannot accept other codes.
To resolve this issue, you can remove one or more existing user codes to accommodate the new, correct user code. This can be done either by using the master code or by following the steps in the user manual for your lock model. It is also recommended to periodically review and delete codes that are no longer needed.
8. Lock connectivity issue.
Schlage locks have built-in WiFi so they can connect directly to your smart home. If the red light on the lock is flashing, there may be a connectivity problem.
To fix this problem, check your network settings and make sure the lock is correctly paired and connected to the network. Make sure the network is working properly and no other devices are interfering with the connection.

9. Programming error.
A flashing red light on a Schlage lock can also indicate a programming error, which can happen when technology changes occur. You must also enter an access code that is the same as your user program code. To fix this problem, delete the existing user code to add a new one. Make sure you enter the same code twice.
10. Perform a manual reset.
If all else fails and your Schlage lock is still flashing red and unresponsive, you may need to reset it to factory defaults. Here is a video from the official account of lock manufacturer Schlage. Once the Schlage lock has been reset, you can change the programming code to a new programming code and try again to fix the problem.
If this does not work, you may need to contact a locksmith or repair service for further assistance. It’s also important to note that if the lock continues to flash red even after you’ve tried all of these troubleshooting steps, it may indicate a more serious problem. It is best to contact Schlage Customer Support for further assistance.
In addition, Schlage locks come in different designs; some of them are equipped with a keyboard, others with smart-home integration, and others with a traditional key. It is important to check your owner’s manual and identify your type of lock, as the troubleshooting steps may vary.
How to Reset Schlage Lock in Red intermittent
If your Schlage screw is flashing red, it means the battery is low and needs to be replaced. To factory reset, follow these simple steps:
- Remove the Schlage Locks keyboard battery
- Press the Schlage button at the top of the lock for at least 10-15 seconds.
- Simultaneously recharge the batteries while pressing the button.
- If this is successful, you should hear a beep and see a light green on the Schlage keyboard lock.
Note: Resetting the Schlage lock will erase all stored codes, so make sure you remember your important codes or keep a backup list of them.
Frequent questions
Q1: Can a Schlage lock malfunction due to changes in weather?
Yes, extreme temperatures and humidity can affect the performance of a Schlage lock; it is recommended to check the performance of the frog under these conditions and to lubricate it to prevent sticking or freezing.
Q2: Can I change the settings of my Schlage lock remotely?
It depends on the lock model; some Schlage locks are equipped with smart-home integration and can be controlled via an app or smart home hub, while others have a keypad that allows you to change settings locally.
Q3: Can I install a Schlage lock 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 have any doubts, it is always best to call a professional.
Q4: Does the Schlage lock have a warranty?
Yes, Schlage locks come with a limited warranty; warranty terms and conditions may vary depending on frog model and date of purchase; you can check the user manual or contact customer support for more information.
Conclusion
A flashing red light on a Schlage lock can be a frustrating problem to deal with, but it can often be resolved by troubleshooting the problem and addressing the root cause.
We hope our solutions above helped you to fix the problem. But if you still encounter the problem, it is always best to refer to the user manual or contact customer support for further assistance. They can provide additional troubleshooting steps or check whether the lock is under warranty and offer you a replacement or repair if applicable.