Siemens Function Selector / Mode Switch Failure

Oven light works but fan and heating do not start when a program is selected, no code shown

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Worn mechanical function selector switch (on knob models), Broken selector shaft, Loose connector on selector switch

Safety: Isolate the oven from mains before removing the control panel.

Check knob feel: Rotate the function selector knob through all positions. Excessive looseness or dead spots suggest wear.
Access selector: Remove the control panel fascia to expose the rotary switch.
Inspect contacts: Look for burnt or broken contacts and melted plastic. Reseat the wiring connectors.
Test continuity: Using the wiring diagram, test the switch positions with a multimeter. Replace the Siemens selector switch if contacts do not close as specified.

Medium 3/5

Function Selector Switch

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