E5
Thermador
Power Supply or Low Voltage Error
Oven displays E5 and may not start or may shut down unexpectedly.
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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
Incorrect line voltage to oven, Loose power connections at terminal block, Damaged power cord or junction box wiring, Faulty EOC power supply section
How to Fix / Troubleshooting
Safety first: This involves high voltage. If you are not experienced with electrical work, contact a qualified technician. Always turn off power at the breaker before opening any electrical compartments.
- Verify supply voltage: With a multimeter and power ON (only if qualified), check that the oven is receiving the correct voltage (typically 240V AC across L1–L2 and 120V from each leg to neutral, depending on region).
- Inspect terminal block: With power OFF, remove the rear cover to access the terminal block. Tighten any loose screws and look for burned or melted wires. Replace damaged wiring and the terminal block if necessary.
- Check junction box: Inspect the wall junction box for loose wire nuts or signs of overheating. Correct any poor connections.
- Control board inspection: If external wiring is good, the EOC's internal power supply may be failing. Look for burnt components or bulging capacitors. Replace the EOC if damage is found or if E5 persists.
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Repair Difficulty
Professional Required
5/5
Required Part
Electronic Oven Control (EOC) Board
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