Thermador MED301JS 30 in Masterpiece Series Single Wall Oven with 4.3 cu ft Capacity and Steam Bake F4 Error Fix: Oven Control Board Failure

Error code F4 on the Thermador MED301JS 30 in Masterpiece Series Single Wall Oven with 4.3 cu ft Capacity and Steam Bake means: Oven Control Board Failure. The main electronic control board has malfunctioned, causing erratic oven behavior such as failure to start, incorrect temperature display, or unresponsive controls.

The most successful fix is "Replace Control Board" (hard difficulty, ~60 minutes). Estimated DIY cost: $100-$150. 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 Control Board") is rated hard difficulty and takes about 60 minutes. Tools needed: Phillips screwdriver, Needle-nose pliers.

DIY cost: $100-$150. Professional repair typically costs $250-$350. Many homeowners save money by trying the top-ranked community fix first.

The Thermador MED301JS 30 in Masterpiece Series Single Wall Oven with 4.3 cu ft Capacity and Steam Bake has 8 other known error codes, including: F1 (Temperature Sensor Failure), F10 (Oven Relay Stuck), F11 (Oven High Limit Thermostat Tripped), F12 (Oven Temperature Sensor Open Circuit), F13 (Oven Door Gasket Torn), and 3 more.

Error code F4 also appears on 6 other Thermador models: DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity, PODS301W 30 in Wall Oven with 4.3 cu ft Capacity and Convection Cooking, PRD366WGU Pro Grand Range, PRD486WDGU Pro Grand 48", PRL366WG 36 in Pro Grand Range with 5 Burners, 22,000 BTU Power Burner, and Convection Oven, 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.