Liftmaster Error Code 4-3 [How to Fix]

Liftmaster Error Code 4-3

Liftmaster Error Code 4-3 – Liftmaster offers a complete and combined solution for door automation for both industrial and residential buildings. 

Complaints of Liftmaster error 4-3 are not that rare when you browse online forums. You might face error code 4-3 when the operator detects a loss of power in the motor (RPMs – revolutions per minute) when trying to close. 

In this case, the garage door stops and reverses before touching the floor and returns to the open position. So, if you are looking for a way to fix the issue, you’ve come to the right place. In this article, we’ll show you how you can fix the error 4-3 on Liftmaster. 

Liftmaster Error Code 4-3

Your garage door opener comprises adjustable travel and force settings. These travel adjustments let you set where the door stops in the up and down position. 

So, it is very common that you will get an error code on an automated door. Some Liftmaster models can be adjusted by turning screws located on either side of the garage door opener motor, whereas others are programmed using two colored buttons. 

Error code 4-3 on Liftmaster is caused by a loose travel module or the connecting wires. So, here are a few solutions that can help you fix the issue. 

Check Mounting Brackets 

Check mounting tabs or screws to make sure a snug fit between module and motor or bracket. Besides, the orientation of the mounting brackets might also cause this problem. 

So, it is better to fix the alignment problem and remember that the compatibility of the mounting brackets can differ based on the layout of your garage door. 

Check Module Wires 

Liftmaster error code 4-3 is caused due to loose travel module wires. Therefore, check connection points to make sure a snug fit. Moreover, you can also repair or replace the wire harness. 

Contact your Near Dealer 

If you are inexperienced and do not know how to segregate the defective components, it is always better to take the help of your nearest dealer. To locate dealers near you, visit this page

Contact Liftmaster 

Finally, the last thing you can do about the Liftmaster error 4-3 is to get in touch with Liftmaster’s customer support. So, visit here and connect to the customer service. 

Final words: Since too much force on the garage door will interfere with the proper operation of the safety reversal system, never increase the force beyond the minimum amount needed to close the door. 

You can follow the above solutions to fix the problem and if the issue persists, contacting Liftmaster’s customer service is always the better option. Hopefully, the above article on Liftmaster error code 4-3 has helped you to fix the issue you are encountering. 

Frequently asked question

How do I fix error 4-3 on Liftmaster?

Check mounting tabs or screws to ensure a snug fit between module and motor or bracket and check connection points to ensure a snug fit. You can also try to repair or replace the wire harness.

How do you fix excessive closing force?

Never increase the force beyond the minimum amount needed to close the door and, never use adjustments to compensate for a binding or sticking garage door, and the safety reversal system should be tested every month.

How do you bypass garage door sensors?

To quickly bypass your garage door sensors, just hold the open/close button down. 

Liftmaster Error Codes:
Liftmaster Error Code 4-1 [How to Fix]
Liftmaster Error Code 4-2 [How to Fix]
Liftmaster Error Code 4-6 [How to Fix]
Liftmaster Error Code 1-5 [How to Fix]
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