How to fix Excessive Closing Force Detected Error Code 4-3?

The excessive closing force detected error code 4-3 occurs when the closing force of the door is greater than the allowed maximum. This can happen for a number of reasons, including a door that is not properly aligned, a door that is binding on the frame, or a door that is not level. Excessive closing force can also be caused by an object that is blocking the door from closing properly.

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• liftmaster 8500w excessive closing force detected error code 4-3
• excessive closing force detected error code 4-3

• Check that the door is properly aligned and not binding
• Check for any obstructions in the door or door frame
• Adjust the door closer spring tension
• Replace the door closer

1. Check that the door is properly aligned and not binding

If the door is properly aligned and not binding, the steps to check are as follows:

1. Verify that the door is properly installed according to the manufacturer's instructions.
2. Verify that the door is properly aligned.
3. Verify that there is no binding on the door or its tracks.
4. Verify that the door is properly lubricated.
5. Verify that the door is properly adjusted and aligned to the frame. If any of the steps are not followed, the door may be binding and the excessive closing force detected error code 4-3-1 may be displayed.

2. Check for any obstructions in the door or door frame

1. Open the door and inspect for obstructions in the door or door frame.
2. If there are any obstructions, remove them.
3. Verify that the door is properly closed by manually pressing and holding the door closed for a few seconds.
4. If the door is still closing excessively, replace the door assembly.

3. Adjust the door closer spring tension

1. Open the door and locate the tension spring on the door closer.
2. Loosen the tension spring by turning it clockwise with a wrench.
3. Re-tension the tension spring by turning it counterclockwise.
4. Close the door and check the closing force. If there is an excessive closing force, re-tension the tension spring until the force is within the acceptable range.

4. Replace the door closer

1. Verify that the door is properly closed by ensuring that the door is closed all the way and the handle is in the "closed" position.
2. If the door is not properly closed, close the door using the handle until it is properly closed.
3. Verify that the door closer is properly connected to the door by checking the continuity of the wires.
4. If the wires are not properly connected, remove the door closer and reconnect the wires.
5. Replace the door closer if the wires are not properly connected.