How to Fix / Troubleshooting

Safety first: Disconnect mains power. Do not force the knob, as this can break the shaft.

Remove knob: Pull off the function selector knob and check for physical obstruction or damage.
Access selector switch: Remove the control panel to inspect the rotary switch.
Inspect for heat damage: Look for melted plastic or deformed parts. If present, the switch must be replaced.
Lubrication: If the switch is mechanically sound but stiff, a very small amount of electrical contact lubricant on the shaft (not contacts) may help. Avoid over-lubrication.
Replace switch: If rotation is still restricted, replace the function selector switch with a Severin part, transferring wires one by one.
Test: Reassemble and verify smooth rotation through all positions.

Oven selector knob very stiff or cannot be turned through all positions

Possible Causes