Make sure it is hanging down from the motor.
Guardian garage door won t open.
Limit adjustments define the points at which the garage door will come to rest in the open or closed position.
Disconnect the door from the trolley and try the test.
When the door is lowered the spring winds up tightly creating a pulling force that helps lift the door up.
The guardian units are the most difficult to acquire manuals but i am still in the process of searching data bases in hopes of finding an original one for electronic copy.
If the door opens with the wall switch a simple battery change in the remote should do the trick.
If the garage door opens correctly but fails to close completely there may be one of three common causes.
You might be out of range.
Your garage door has set limit switches that instruct the motor when to stop running both when it is opening and when it is closing.
There is a down limit setting that stops the door at the close position and open limit setting that stop the door at the desired open position.
Many garage doors have a powerful torsion spring located horizontally above the door.
The antenna on the motor could be damaged or blocked from the signal.
A guardian operator will function properly only with photo eyes made by guardian access.
If you own a guardian 628 electronic garage door opener and it will not open or close count the number of beeps.
If it is 12 beeps chances are you have a bad main circuit board.
It is odd for any opener to not open at least some.