Thermador PRD486WDGU Pro Grand 48" F14 Error Fix: Oven Relay Stuck

Error code F14 on the Thermador PRD486WDGU Pro Grand 48" means: Oven Relay Stuck. A relay on the control board is stuck in the on or off position, causing continuous heating or failure to heat. This usually results from a failed relay coil or weld points.

The most successful fix is "Replace Oven Control Board" (hard difficulty, ~45 minutes). Estimated DIY cost: $150-$250. 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 Oven Control Board") is rated hard difficulty and takes about 45 minutes. Tools needed: Phillips screwdriver, Nut driver, Label maker.

DIY cost: $150-$250. Professional repair typically costs $300-$450. Many homeowners save money by trying the top-ranked community fix first.

The Thermador PRD486WDGU Pro Grand 48" has 8 other known error codes, including: F1 (Oven Temperature Sensor Failure), F10 (Oven Door Gasket Failure), F11 (Oven Thermal Fuse Blown), F12 (Oven Door Switch Malfunction), F13 (Oven Sensor Thermistor Open), and 3 more.

Error code F14 also appears on 4 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, 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.