another Craftsman Garage door opener question
I have a model 139.53636SRT. I think it's about 12 years old. It decided it wasn't going to close anymore. The light comes on, and it hums for a second, then clicks. The light does not flash, like it normally would if something was blocking the sensors. I checked the sensors, they both have a solid green light, which goes away when I stick my hand in front.
Since it was cold out, I pulled the release cord to lower it. But now it won't go up, and I don't know how to lift it manually.
So my 2 questions: how do I release it so I can lift it manually, and what might be keeping it from working?
Thank you so much - this is my mom's garage, and I don't want her to have to worry about opening the door - especially now that winter is starting.