Behind the suction dial on an AIRBELT E1 KOMBI, and on an E2 TURBO as well, sits a small toothed pinion, and turning the dial is what moves it. The pinion hands that movement to the potentiometer sitting behind the fascia. Part 8256ER is the pinion on its own.The chain it belongs to is short and mechanical at the front end. Your fingers move the control, the pinion turns the potentiometer shaft, the potentiometer changes its resistance, and the control board reads that change and sets the motor to suit. On these two canisters the board in question is 8292ER, which covers the AIRBELT E1 KOMBI and E2 TURBO exactly as this pinion does. Because the pinion is the only link in that chain made of moulded plastic and loaded directly by hand, it is the link that wears.Rounded teeth, or a pinion gone slack on its shaft, and the dial spins with nothing happening, or it responds across part of the sweep and then dies. That pattern is worth learning, because it is a cheap fault that reads exactly like an expensive one. A technician who assumes a board failure and fits 8292ER first will find the symptom completely unchanged and the money gone. Fitment: SEBO AIRBELT E1 KOMBI and E2 TURBO canisters Part number: 8256ER Pack: one pinion Mounts to: the potentiometer shaft behind the suction control Fixes: a dial that spins with no effect, or one that responds over part of its sweep and then goes dead Access: the canister body has to be opened, so it is worth fitting alongside any other internal work Diagnose first, then fit it while the machine is already apart on the bench. Owners look for this one as a SEBO suction control gear, an E1 KOMBI potentiometer pinion, or simply as 8256ER. A genuine SEBO component from an authorized dealer, shipped in 2-5 business days.
