I am running into serieous trouble. Thank you in advance for your kind help.
My garage door opener is a Genie Norelco Trac-Drive Model 250 (an old model). The trouble started when one of the spring broke. At that time, the door was in almost closed position. I got two springs from home Depot. The original springs were for 140 lbs doors, the new ones I got is for 150 lbs (I hope there is no big trouble for this choice becuase Home Depot is running out of 140 lbs ones).
So, the current picture is: Door was nearly completely closed, one spring broke and the other spring was in extended position.
As you can see, I am a novice and did several stupid things: Since one old spring was in its extended position, I thought I would need to lift the door up in order to dissemble the remaining old spring and put two new spring back. So, what I did was to push to button to open the door, and in the meantime, try to lift the door from the side where the spring was broken. I though I could help the door back to its open position. This did not work. The opener only move a couple inches then stops.
Then I realized that there is a emergency pull that disengage the door from the opener. I also discovered the function of the two limiting switches.
So, I disengaged the door from the opener using the emergency pull. I was also careful to make sure that the moving-end of opener was touching the limit switch as if the door is completely closed. My intent is to let the door opener retract back to the box hanging on the ceiling. Right now, the opener is almost extended toward the door--I will call this LOCATION A.
When I push the button, hoping that the the opener will travel back to the box. However, it travels back towards the box for only three inches. When I push the button again, it travels back to LOCATTION A.
I hope the opener (disengaged from the door) can travel its full range back to the box. But right now, it only move in a very limited range (three inches). Probably, I should reset something?
Your input is highly appreciated. Thank you very much for all the help.