SEBO Electronic Controller ...
$53.00
Product details
Power regulation and the on-off control on an AIRBELT K2 live on one assembly, and 6641ER is that assembly complete with its switch. SEBO places it at position 14 in the AIRBELT K diagram.
That position carries more than one number on the sheet — 6645ER is the other build of the same board, cut for a different machine in the family — so read the number printed on the board being replaced before ordering. From position 14 the supply runs out along the white internal cable 6638 at position 16 and into the 1250W motor 6631ER at position 17, with motor cover 6679GS at position 21 closing over the pair.
What presses the switch on this assembly is not part of it. That is the molded lever at position 12, sold with its leaf spring as 6621, and the spring on its own is 1739 at position 13. A control that feels dead is worth testing there first, because a cracked lever mimics a failed board almost exactly and is a far smaller job to put right.
Where the board really is at fault, the symptoms are electrical rather than mechanical: a machine that starts and stops on its own, ignores the control, runs at a level nobody selected, or trips out a few minutes into a job. Photograph each connector before pulling it and rebuild the loom exactly as you found it.
- Part number: 6641ER
- Fitment: SEBO AIRBELT K2 KOMBI and AIRBELT K2 TURBO
- Supplied with: switch
- Diagram position: 14, AIRBELT K
- Related numbers: 6621 switch lever with leaf spring, 1739 leaf spring, 6638 internal cable, 6631ER vacuum motor
- Before ordering: check the data plate and the number on the old board
Genuine SEBO electronics, authorized dealer stock, shipping in 2–5 business days.

