Miele S 421i - Control System Servicing

Technical Information
37
S
2xx, S 3xx & S 4xx Canister Vacuums
Figure 5-16: Foot Switch, S 4xx
5.9 Potentiometer/Suction Power Selector
5.9.1 S 2xx
2x1i & 2x2i:
Remove the selector switch knob and change the potentiometer.
2x4i & 2x5i:
1. Release the catch (Figure 5-17, Item 2) with a small screwdriver and
remove the switch cover (Figure 5-17, Item 1).
2. The potentiometer control (Figure 5-19, Item 3) can be removed after
releasing the catches (Figure 5-18, Item 1).
3. The toothed belt (Figure 5-19, Item 1) can be replaced when the indicator
cylinder (Figure 5-19, Item 4) is levered from its holder.