Craftsman 139.53964SRT Down Force Setting
Recently my garage door opener began auto-reversing about 1/4 of the way to closing. To remedy the problem I increased the setting of the downward force from 2 to 4. However, I know that this is only masking the symptom. There is an actual problem somewhere. Can anyone speculate on what the root cause problem might be? The reversing occurs when a new section of the door begins to move downward.
Thanks in advance!