E20
Blomberg
Temperature Selector Potentiometer / Encoder Fault
Oven shows E20; temperature knob changes have no effect or temperature jumps erratically.
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Safety Warning
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.
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Possible Causes
Worn temperature potentiometer, faulty rotary encoder, loose knob, damaged wiring to temperature control
How to Fix / Troubleshooting
Safety first: Turn off power before removing the control panel.
- Check knob: Remove the temperature knob and ensure the flat on the shaft is not stripped. Replace the knob if it does not grip properly.
- Access temperature control: Remove the control panel to expose the temperature potentiometer or encoder.
- Inspect and test: Check for cracked housing or loose terminals. Measure resistance while turning the shaft; it should change smoothly without sudden jumps.
- Replace component: If readings are erratic or open, replace the temperature selector potentiometer / encoder.
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Repair Difficulty
Medium
3/5
Required Part
Temperature Selector Potentiometer
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