Thermador PRL366WG 36 in Pro Grand Range with 5 Burners, 22,000 BTU Power Burner, and Convection Oven F12 Error Fix: Oven Temperature Sensor Short Circuit

Error code F12 on the Thermador PRL366WG 36 in Pro Grand Range with 5 Burners, 22,000 BTU Power Burner, and Convection Oven means: Oven Temperature Sensor Short Circuit. The oven temperature sensor wiring has a short circuit causing incorrect temperature readings. This prevents the oven from heating properly and may cause error codes. The oven may not start heating or may shut down unexpectedly.

The most successful fix is "Replace Temperature Sensor and Harness" (medium difficulty, ~35 minutes). Estimated DIY cost: $35-$60. HomeMD has 2 community-ranked fixes for this error.

This error is rated critical severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Replace Temperature Sensor and Harness") is rated medium difficulty and takes about 35 minutes. Tools needed: Phillips screwdriver, Multimeter.

DIY cost: $35-$60. Professional repair typically costs $150-$210. Many homeowners save money by trying the top-ranked community fix first.

The Thermador PRL366WG 36 in Pro Grand Range with 5 Burners, 22,000 BTU Power Burner, and Convection Oven has 8 other known error codes, including: F1 (Oven Temperature Sensor Failure), F10 (Oven Relay Stuck), F11 (Oven Door Sensor Error), F13 (Oven Relay Open Circuit), F14 (Oven Door Latch Motor Failure), and 3 more.

Error code F12 also appears on 5 other Thermador models: MED301JS 30 in Masterpiece Series Single Wall Oven with 4.3 cu ft Capacity and Steam Bake, PODS301W 30 in Wall Oven with 4.3 cu ft Capacity and Convection Cooking, PRD366WGU Pro Grand Range, PRD486WDGU Pro Grand 48", T36BT925NS 36 in 20.9 cu ft Freedom® Collection French Door Refrigerator with WiFi Connectivity and ThermaFresh System. The fix may vary by model, so check each model's specific page for tailored repair steps.