What F5 Means
Bertazzoni's own use & care manual lists F5 as a pressure system failure — the component that monitors water pressure inside the tub isn't reporting a reading the control board can trust to manage the fill and wash cycle.
Common Causes of F5
- A failed or drifting water-pressure sensor
- A pressure-sensing hose or tube that's pinched, disconnected, or has a slow leak
- A wiring fault between the pressure sensor and the control board
🔧 One Safe Check You Can Try
There isn't a safe homeowner check for this one — the pressure sensor and its tubing are tested with the unit open and partly de-energized, which Bertazzoni's own manual routes straight to "Contact service" rather than listing a user step.
⚠ Why You Shouldn't Go Further Than That
- The pressure sensor and its tubing sit low in the tub near line-voltage wiring, and working there without fully de-energizing the unit is a shock risk.
- A pressure tube reconnected even slightly off can cause chronic overfilling or underfilling that looks like a completely different fault afterward.
- This is easy to confuse with a flow-meter or inlet-valve issue, and buying the wrong part first is a common, costly misstep.
- Reaching the pressure system typically means removing the base pan, one of the more common ways this warranty gets voided.
- A misdiagnosed swap that doesn't fix the real fault leaves the dishwasher stalling mid-cycle repeatedly, risking standing water sitting in the tub longer than it should.