Excellent! Thanks for cracking that thing open and showing how it works. I just got done fixing my HD200D. The plastic screw in the center with the arms on it had popped completely out of its place, as had the one with the "close" contact on it. I carefully popped those back into their retainers. Also, I had to slightly bend the the metal part that hits the open/close contacts so that it would actually hit the "open" contact instead of just hitting the contact's plastic piece. Works now!
If I had to assume, I'd say the switching unit is the thing the yellow, gray and brown (at least on my opener) are going into. I'm just speculating here, but that is the only thing that makes sense to me. I ended up just exchanging my opener for a new one since it was brand new, and that resolved my issue.
what is the switching unit? my door is not stopping when it goes up. it just keeps going up until it hard stops and trips the overload. it's going right past the electrical limit like yours was....
Excellent! Thanks for cracking that thing open and showing how it works. I just got done fixing my HD200D. The plastic screw in the center with the arms on it had popped completely out of its place, as had the one with the "close" contact on it. I carefully popped those back into their retainers. Also, I had to slightly bend the the metal part that hits the open/close contacts so that it would actually hit the "open" contact instead of just hitting the contact's plastic piece. Works now!
If I had to assume, I'd say the switching unit is the thing the yellow, gray and brown (at least on my opener) are going into. I'm just speculating here, but that is the only thing that makes sense to me. I ended up just exchanging my opener for a new one since it was brand new, and that resolved my issue.
what is the switching unit? my door is not stopping when it goes up. it just keeps going up until it hard stops and trips the overload. it's going right past the electrical limit like yours was....
You're going to need to replace the limit switch assembly, there around $15-20 on any online garage door dealer.