Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity F1 Error Fix: Water Pressure Sensor Failure

Error code F1 on the Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity means: Water Pressure Sensor Failure. The dishwasher's water pressure sensor has failed or is providing inaccurate readings, affecting water intake and cycle performance.

The most successful fix is "Replace Water Pressure Sensor" (medium difficulty, ~40 minutes). Estimated DIY cost: $40-$60. HomeMD has 2 community-ranked fixes for this error.

This error is rated high severity. You should address it promptly — continued use could cause damage or safety concerns.

Yes — the top-ranked community fix ("Replace Water Pressure Sensor") is rated medium difficulty and takes about 40 minutes. Tools needed: Phillips screwdriver, Multimeter.

DIY cost: $40-$60. Professional repair typically costs $130-$180. Many homeowners save money by trying the top-ranked community fix first.

The Thermador DWHD660WFM 24 in 42 dBA Sapphire Series Dishwasher with Star Dry and WiFi Connectivity has 8 other known error codes, including: E1 (Water Inlet Valve Error), E2 (Drain Pump Failure), E3 (Door Lock Failure), E4 (Heater Element Failure), E5 (Water Temperature Sensor Fault), and 3 more.

Error code F1 also appears on 6 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", 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.