In the video below you see two cases of improper spring size.
How do i know what size spring i need for my garage door.
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Converting from a single spring to a dual spring was the key.
The solution to replacing a garage door spring is first identifying the problem.
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When using two scales add the weights together for the total door weight.
Springs are too small.
When you are preparing to buy a garage door spring you need to also take into consideration the overall cost of buying or replacing your springs.
In the first example the spring is too small.
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If your garage door is the two spring type it is required to measure and record the specification of each one.
If the issue is an ill fitting spring you first need to determine the proper size for your specific door.
1 the length 2 wire size 3 inside diameter 4 spring wind and 5 types of ends.
If your door is 210 pounds you would need a pair on for each side of the 210 pound white springs.
Total door weight indicates the springs you will need for example if the door weighs 100 pounds you need two 100 pound springs one on each side.