This is my 1st post to this forum, which I thought included Craftsman.
My opener is model 139.53973SRT. I was installed over 10 years ago and has worked fine all during the last 7 years we've been here. Recently, I opened the door using the outside keypad. It opened just fine. When I went to close it, it did something I've never seen before: it began the close but after moving the door about a foot an a half, it quickly stopped and reversed to its full open position. The light on the unit flashed for a couple seconds. (The only time I'd seen anything like this is when it's been really humid. It usually clears itself up in a day or two.) Lately, it's been hot but with low humidity.
I checked the control settings noted that the down force pot was set on about 1. I increased this to 3 or so, with the same result. I also tried to shut off the power in an effort to allow it to "reset its brain", but that, too, didn't seem to help.
Would anyone know what may have caused this? I'd really like to get it working again.
Any help is appreciated.
My opener is model 139.53973SRT. I was installed over 10 years ago and has worked fine all during the last 7 years we've been here. Recently, I opened the door using the outside keypad. It opened just fine. When I went to close it, it did something I've never seen before: it began the close but after moving the door about a foot an a half, it quickly stopped and reversed to its full open position. The light on the unit flashed for a couple seconds. (The only time I'd seen anything like this is when it's been really humid. It usually clears itself up in a day or two.) Lately, it's been hot but with low humidity.
I checked the control settings noted that the down force pot was set on about 1. I increased this to 3 or so, with the same result. I also tried to shut off the power in an effort to allow it to "reset its brain", but that, too, didn't seem to help.
Would anyone know what may have caused this? I'd really like to get it working again.
Any help is appreciated.
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