How To Fix Liftmaster Error Code 4-3?

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Published on: , Last Updated on July 22, 2023

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Liftmaster Error Code 4-3

If you have installed Liftmaster door systems at your house and are facing the following Liftmaster Error Code 4-3 when trying to close or open a particular door. Then, chances are that you are seeing the following error message as a result of loss of power in the liftmaster motor system when trying to close or open the particular door.  

Whenever, a door does not close properly or has some trouble opening. Then, such an error occurring should be quite common. 

That being said, a door may not shut or open properly due to a number of reasons. Things like motor issues with the door system as well as loose connections or damaged modules and panels can all be a reason for causing the error to show up. Hence, it is very important that in order to get rid of the error, we must first check and take care of any such issues which may be responsible for the following Liftmaster Error Code 4-3 to occur. 

And so, without any further ado. Let us have a look at all the possible solutions out there, with the help of which you should be able to fix the issue pretty much by yourself and in no time:


Fixes For Liftmaster Error Code 4-3


Fix 1: Check Mounting Brackets

Check whether the mounting brackets are installed properly. The mounting tabs and screws should be fixed properly for proper balance between the module and brackets. 

You should also check the alignment and balance it accordingly to get the best results and avoid any such errors arising due to a wrongly aligned door system. 

Moreover, there may be times when different components within the door system might not be compatible with one another. In such cases, they too might cause such an error to occur.


Fix 2: Check Loose Module Wires

Loose module wires have been seen to be one of the most common reasons out there causing the following error to occur. 

If that is the case for you too. Then, checking for such loose connections within the system and repairing any damaged wires or harness should be the best solution out there to fix the following issue.


Fix 3: Check whether door is aligned properly

If your door is not aligned properly or not mounted properly. Then, such an error showing up often might be quite normal. 

Hence, it is important that you check whether your door is aligned properly. And if not, then align the door properly to check and see if the error still persists.


Fix 4: Check for any kind of obstruction 

There may be times when some or the other kind of obstruction in between your door and panel or sensors might be the reasons responsible for the following error to occur. 

In such cases, check for any such obstruction and clear it accordingly to fix the following issue.


Fix 5: Adjust the door closer spring

Loosening or tightening the door closer spring can also help at times to take care of the error, if it is something caused due to a tight door closer spring.

Here, all you need to do is simply locate the closer spring of the door and loosen the tension spring with the help of a wrench. 

If it is too loose. Then, you can turn the tension spring in an anti-clockwise direction to see if doing so helps get rid of the error. 

You will need to loosen and tighten the spring, until you meet the point which is ideal for the door and does not cause the following error to occur.


Fix 6: Contact Liftmaster Customer Support

If none of the solutions as shown above work for you. Then, it would be a good idea to directly contact Liftmaster’s Customer Support or go to your nearest Liftmaster dealers and discuss the problem with them to come up with a viable solution to fix the issue.


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Rishikesh Hazarika is a tech enthusiast who is always curious to learn and absorb facts and data in the world of science and technology as well as tries to share his opinion. He has an M.Tech degree from North-Eastern Hill University, later he did a certificate course in Computer Hardware and Software, and a certificate course in Introduction to Architectingc