Hello I have a sears crafstman garage door opener 1/3 horsepower. I guess it could be 20 yeas old, i think the motor died. The door stopped half way up. It just makes a grinding noise and doesn't move the chain so I think the motor and housing need to be replaced. The chain and rails seem to be fine, they will move if i pull them, so not jammed.
I looked up the model online and it looks too old to get replacement parts. So i'm happy to buy a new garage door opener, but I really just want to replace the motor and housing and use the existing chain and rails. Otherwise its a bigger job.
-Are garage door chains a standard size?
-Would It be best to stick with Sears Craftsman brand to get a proper fit?
Thanks