La Cornue Convection Oven E3 Error: Conv Element Open Circuit
La cornue convection oven e3 error: Overview La cornue convection oven e3 error — this page covers the causes, symptoms, safe checks, and repair-cost guidance drawn from La Cornue owner documentation and certified service records. Understanding the E3 Error E3 means the convection heating element — the ring-shaped element behind the rear panel — has […]
~5%
DIY Fixable
From $300
Typical Repair Cost
2–3 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Maybe. Standard bake and broil modes remain functional. Only convection heating is affected. Avoid convection modes until repaired.
Can I reset the code?
Yes. A power cycle may clear E3 temporarily, but it will return when convection is selected if the element is open.
When to stop immediately?
Stop if you notice: If you see visible damage to the element (bulging, discoloration), do not use convection., If multiple heating modes fail simultaneously, disconnect power..
Symptoms You May Notice
Convection mode heats poorly
Food remains undercooked or cooks much slower than expected in convection mode.
E3 when selecting convection
Error appears immediately or shortly after selecting a convection cooking mode.
Regular bake works normally
Standard bake and broil modes function correctly, only convection fails.
No heat from rear of cavity
The convection element behind the rear panel produces no heat even when activated.
Possible Causes
Burned-out convection element
The circular heating element around the convection fan has broken internally from thermal fatigue.
Requires ProfessionalElement terminal connection failure
The wire connections at the element terminals have corroded or loosened.
Requires ProfessionalBoard relay failure
The relay on the control board that powers the convection element has failed open.
Requires ProfessionalSafe Checks You Can Do
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1
Power cycle
Turn off breaker for 2 minutes, then test convection mode.
A transient electrical issue can sometimes trigger E3.
-
2
Test other modes
Try standard bake and broil to confirm only convection is affected.
If all modes fail, the issue may be in wiring rather than the element.
-
3
Listen for the fan
In convection mode, listen for the fan running — this confirms F4 is not the issue.
Fan running with no heat confirms element failure, not fan failure.
When to Call a Professional
Contact a qualified technician if:
- Element continuity testing with a multimeter confirms the open circuit.
- Element replacement requires removing the rear oven panel.
- If the relay is at fault, board repair or replacement is needed.
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
Convection Oven Repair Service Schedule Appointment