I have an old Avalon 1196 insert which works fine. The fan does a good job of pushing out heat but it is manually low high off. There isn't a snap disk. I want to know if the previous owner removed parts or if that is how this stove/blower was originally designed. Can I retro fit a snap disk and a variable speed rheostat, how about a toggle switch to have it manual or auto on/off? Has anyone done this and could you tell me what parts I need and where I can purchase them.