A — Oven error code

Thermador E218 — Broil element relay stuck — continuous top heating

Complete diagnostics and troubleshooting guide for Thermador oven error code E218. Learn what it means, what causes it, and whether you need professional repair.

Severity Critical Repair Needs technician Components Control board relay, broil element, thermal fuse

Daniel Hernandez Master Appliance Technician

Schedule repair 1-844-9023945

B — Quick facts

E218 at a glance.

Error code E218

Appliance type Oven

Severity Critical

Repairability Needs technician

Affected components Control board relay, broil element, thermal fuse

C — Diagnosis & repair

Understanding error code E218.

Broil element relay stuck — continuous top heating

What Thermador E218 error means on your oven

Thermador oven error code E218 indicates: Broil element relay stuck — continuous top heating. This is classified as a Critical-severity issue — stop using the appliance immediately and call a technician.

What Thermador oven error code E218 means

E218 is the broil element equivalent of E118 — the relay controlling the broil (top) heating element is stuck on. The broil element will heat continuously regardless of control panel settings. This is a safety-critical code requiring immediate action.

Immediate action

Turn off the circuit breaker immediately. Do not attempt to use the oven. Do not open a locked door. Allow to cool completely before any service.

Cause and repair

Same as E118 — the relay contacts have welded together. Control board replacement is required. The broil element and thermal fuses should also be inspected for damage from prolonged uncontrolled heating. Schedule urgent service.

Error E218 quick reference

Error code: E218
Appliance type: Thermador Oven
Severity: Critical
Repair type: Needs technician
Affected components: Control board relay, broil element, thermal fuse

Troubleshooting Thermador E218 step by step

Power reset: Turn off the appliance at the circuit breaker for 5 minutes, then restore power. If E218 clears and doesn’t return, a transient electrical issue caused it.
Visual inspection: Check for obvious issues — loose connections, visible damage, water leaks, or unusual sounds from the affected components (Control board relay, broil element, thermal fuse).
Document the error: Note when E218 first appeared, whether it’s constant or intermittent, and any other symptoms (sounds, smells, performance changes).
Check related systems: Error codes can sometimes be triggered by adjacent systems — verify that water supply, electrical connections, and ventilation are functioning normally.

Professional diagnosis and repair

If E218 persists after a power reset, professional diagnosis is required. Our certified Thermador technicians use factory diagnostic tools to read stored error history, test individual components (Control board relay, broil element, thermal fuse), and identify the exact failure point.

Repair typically involves:

Retrieving and analyzing stored fault codes from the control board
Component-level testing of the Control board relay, broil element, thermal fuse
Replacing failed components with genuine Thermador OEM parts
Verifying the repair by running a test cycle and confirming the error clears

Preventing Thermador E218 from recurring

While some component failures are age-related and unavoidable, regular maintenance reduces the likelihood of error E218 recurring:

Follow the maintenance schedule in your Thermador owner’s manual
Keep the appliance clean — debris and buildup accelerate component wear
Address minor issues early — small problems left unrepaired often trigger error codes
Use a surge protector — power fluctuations can damage electronic control boards

For complete specifications and troubleshooting documentation, visit the Thermador official site. To schedule certified Thermador oven repair, Schedule service online — we service all Thermador models in all 50 states with genuine OEM parts and a 30-day labor warranty.

Frequently asked questions about Thermador wall ovens

What is True Convection?

True Convection uses a dedicated third heating element behind the fan. Standard convection just circulates heat from the bake/broil elements with a fan. True Convection provides more even heat distribution across all racks without needing to rotate pans.

What does SoftClose mean?

Professional series wall ovens feature hydraulic hinge dampers that prevent the door from slamming. The door closes smoothly and silently from any angle. If your Professional oven door starts slamming, the hydraulic damper pistons need replacement.

How often should I self-clean?

No more than 3-4 times per year. Excessive self-clean cycles stress thermal fuses, door locks, and the oven cavity enamel coating. For routine cleaning, use baking soda paste instead.

Can I use my oven during a steam system descale?

No — the descale cycle uses the oven cavity. The process takes about 45 minutes. Plan around it. Steam ovens should be descaled quarterly (monthly in hard water areas).

What’s the advantage of a triple wall oven?

Thermador is the only brand offering three independent oven cavities. You can bake, broil, and roast at three different temperatures simultaneously — ideal for holiday cooking or entertaining.