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Thermador Error Codes
Common error codes our technicians see in the field. Find your code, learn what it means, and book a diagnostic if you need one.
Trusted Since 2022
2022
Serving Since
60-Day Warranty
Mon–Fri 8am–5pm · Sat 8am–12pm · Sun Closed (CDT)
2022
Serving Since
Service-call pricing
FREE with repair — every tier goes toward your repair, $0 extra.
Standard Most appliances + brands | $99 |
Luxury High-end (Sub-Zero, Wolf, Miele, BlueStar, Thermador, etc.) | $99 |
Commercial Walk-in coolers, commercial laundry, restaurant equipment | $150 |
Warranty: 60-day parts and labor. Technician quotes the repair on-site before any work.
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Below are 30 common Thermador error codes our technicians see in the field, ordered by severity. Find your code, see what it typically means, and call us if you need expert help. transparent service-call pricing (applied to repair).
Critical (17)
— food spoiling, safety, or appliance unusable| Code | What it means |
|---|---|
| EC 01 | Communication error between main control and display. Models: Pro Grand ranges Fix: Technician will check wiring harnesses and connections between control boards, potentially replacing a control board. |
| EC 05 | Oven door lock error. Models: Pro Grand ranges Fix: Technician will inspect the oven door lock mechanism and motor for obstructions or failure. |
| EC 07 | Oven heating element failure (bake or broil). Models: Pro Grand ranges Fix: Technician will test the oven bake and broil elements for electrical continuity and replace if necessary. |
| EC 11 | Oven control board fault. Models: Pro Grand ranges Fix: Technician will diagnose the main oven control board and replace it if found to be defective. |
| EC 12 | Oven user interface board fault. Models: Pro Grand ranges Fix: Technician will inspect the oven's control panel and user interface board, replacing if necessary. |
| EC 21 | Oven door lock error. Models: Pro Grand ranges Fix: Technician will inspect the oven door lock assembly and its motor for proper operation. |
| EC 23 | Oven heating element failure. Models: Pro Grand ranges Fix: Technician will test the bake and broil elements for electrical integrity and replace if open. |
| EC 25 | Oven control board fault. Models: Pro Grand ranges Fix: Technician will diagnose the main oven control board and replace it if it is determined to be faulty. |
| EC 26 | Oven user interface board fault. Models: Pro Grand ranges Fix: Technician will inspect the oven's control panel and user interface board, replacing if necessary. |
| EC 31 | Oven door lock error. Models: Pro Grand ranges Fix: Technician will inspect the oven door lock assembly and motor for obstructions or failure. |
| EC 33 | Oven heating element failure. Models: Pro Grand ranges Fix: Technician will test the bake and broil elements for electrical continuity and replace if burned out. |
| EC 35 | Oven control board fault. Models: Pro Grand ranges Fix: Technician will diagnose the main oven control board and replace it if found to be defective. |
| EC 36 | Oven user interface board fault. Models: Pro Grand ranges Fix: Technician will inspect the oven's control panel and user interface board, replacing if necessary. |
| F1 | Main control board failure or communication error. Models: Masterpiece ovens, Pro Grand ranges Fix: Technician will test control board and replace if necessary. |
| F2 | User interface or display board failure. Models: Masterpiece ovens, Pro Grand ranges Fix: Technician will inspect display panel and wiring, replacing the user interface board if faulty. |
| F4 | Door lock mechanism failure. Models: Masterpiece ovens, Pro Grand ranges Fix: Technician will inspect the oven door lock assembly and motor, replacing components as needed. |
| F8 | Oven heating element failure. Models: Masterpiece ovens, Pro Grand ranges Fix: Technician will test the oven bake and broil elements for continuity and replace if burned out. |
Important (13)— needs service within days
| Code | What it means |
|---|---|
| EC 04 | Oven temperature sensor error. Models: Pro Grand ranges Fix: Technician will test the oven's temperature sensor and its associated wiring for faults. |
| EC 06 | Oven cooling fan failure. Models: Pro Grand ranges Fix: Technician will test the oven's cooling fan motor and replace if defective. |
| EC 10 | Oven door switch error. Models: Pro Grand ranges Fix: Technician will test the oven door interlock switch and replace if it is not functioning properly. |
| EC 14 | Oven self-clean cycle issue. Models: Pro Grand ranges Fix: Technician will check the self-clean lock mechanism, heating elements, and control board for faults related to the cycle. |
| EC 20 | Oven temperature sensor error. Models: Pro Grand ranges Fix: Technician will test the oven's temperature sensor and wiring harness for any issues. |
| EC 22 | Oven cooling fan failure. Models: Pro Grand ranges Fix: Technician will test the oven's cooling fan motor and replace if it has failed. |
| EC 24 | Oven door switch malfunction. Models: Pro Grand ranges Fix: Technician will test the oven door interlock switch and replace if it is not functioning correctly. |
| EC 30 | Oven temperature sensor error. Models: Pro Grand ranges Fix: Technician will test the oven's temperature sensor and its associated wiring for faults. |
| EC 32 | Oven cooling fan failure. Models: Pro Grand ranges Fix: Technician will test the oven's cooling fan motor and replace if defective. |
| EC 34 | Oven door switch malfunction. Models: Pro Grand ranges Fix: Technician will test the oven door interlock switch and replace if it is not functioning correctly. |
| F3 | Temperature sensor fault. Models: Masterpiece ovens, Pro Grand ranges Fix: Technician will test the oven temperature sensor and wiring, replacing the sensor if it is out of tolerance. |
| F5 | Oven cooling fan motor failure. Models: Masterpiece ovens, Pro Grand ranges Fix: Technician will check the oven's convection fan motor and its wiring, replacing the motor if it has failed. |
| F9 | Oven door switch malfunction. Models: Masterpiece ovens, Pro Grand ranges Fix: Technician will test the oven door switch and replace it if it is not functioning correctly. |
Code matches a symptom? Read the diagnostic guide
Thermador codes often correspond to a broader appliance issue. Match your code to a symptom below:
Don't see your Thermador code?
Call us — we've seen most Thermador codes in the field. transparent service-call pricing (applied to repair).
Error code meanings are based on field observation by our technicians. Some codes may indicate multiple underlying issues — a diagnostic visit confirms the root cause. We are an independent appliance repair service and not affiliated with Thermador or its parent manufacturer. Codes shown reflect common scenarios across the Thermador product line; specific behavior may vary by model year and configuration.
How our repair process works
Five steps from your first call to the warranty receipt. No surprises.
- 1
Inspection
Your technician examines the appliance, listens to your description, and notes the model + serial for parts lookup. Visual + audio-based diagnostics first — non-invasive.
- 2
Diagnostics
Targeted tests on the failing subsystem (compressor, control board, heating element, motor, etc.) to identify the exact root cause. You get a clear explanation, not jargon.
- 3
Fix decision
Up-front estimate before any work begins: cost, parts, and the realistic likelihood of success vs. recommending replacement on an old or uneconomical unit. You decide.
- 4
Operational test
After the repair we run the appliance through its normal cycle on-site — never "it should work now, call us if it doesn't." You sign off when it's actually working.
- 5
Warranty + consultation
Receipt with warranty terms in writing. Plus a quick walkthrough of how to extend the appliance's life (filter cleaning, drain maintenance, etc.) — included free.
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