I've watched this thread for a couple of days to see what answers come up, and I admit that I'm still hoping for more information
I have a Sirocco [same design internally as the Ashford, I understand] that is new this season, and I was commenting recently to my husband that the operation of the bypass mechanism feels and sounds different from how it was when it was new. It still seems to be working judging from the activity of the firebox and smoke from the chimney, but I am wondering if something needs adjusting.
When the stove was new I felt as though the handle controlled the closing of the door fully from open to closed. Now there are times when I have wondered if the plate has come off the handle and not closed. When I lift the handle from open to closed, there is a thunk sometimes before I've rotated it past the midpoint. The stove still seems to be operating property with the catalyst, so I assume the bypass is still closing, but it definitely feels and sounds different.
I believe there is a way to adjust the bypass tension, but I've been scanning the manual the last couple of days and have not found that information. I think it involves accessing the stove through the flue collar, adjusting a keeper nut, and adjusting the tension. I looked in the sticky above and found someone asking for a video about it, but the video that followed that was about the bypass gasket.
I do want to make sure I'm operating my stove properly, and it certainly seems to be working properly, so I have no inclination to undertake an unnecessary adjustment, but I have noticed a change in how my bypass feels and sounds, so I'd love more input from the more experienced users about whether that clunk that I can sometimes get before I've gotten the handle to the full upright position. I never just let go of the handle. The clunk happens when I'm moving it.
As I said, the stove is operating just as it should as far as I can tell, so I think the bypass is still closing, but I would love to understand more of what I am feeling and hearing.