Miele dishwasher F51 error code
What F51 means on a Miele dishwasher
Pressure switch fault, possibly from a blockage.
Meaning checked by NAC's engineers, 9 November 2026.
What our engineers say
When your Miele dishwasher shows F51, it is reporting a fault with the pressure switch, which may have been caused by a blockage. You will usually notice it as beeping or flashing lights, and the machine may refuse to run a programme.
Engineers sometimes find that the pressure switch itself has failed or become blocked, and fitting a new one puts things right. Now and then the problem goes further, and engineers sometimes find that the main control board has blown and needs replacing too. A fault with the anti flood switch can also turn up alongside it.
An engineer will typically test the pressure switch to see whether it is responding as it should, and check the wash pump area for blockages. The usual repair is a replacement pressure switch, and if the code remains after that, the main board is checked and replaced if needed. The parts often have to be ordered, so the repair may be finished at a second visit, and occasionally more than one visit is needed if a further fault shows up once the first part is fitted.
Written by our engineers from NAC's own jobs.
Faults this code turns up with
What our engineers found and fixed for each, from NAC's own repair records.
What we fixed. We'll add what our engineers found, the parts they fitted and what customers typically paid once enough of these repairs are confirmed. How we work out our figures.
Before you check anything yourself
- Switch the dishwasher off and unplug it, or turn it off at the isolator switch, before you touch anything. Our guide to safely isolating an appliance walks you through it.
- An error code tells you where to look, not that it's safe to take the dishwasher apart. Don't remove panels or covers to get at the parts it points to: that's an engineer's job.
- If it involves the mains supply, sealed parts, or you're not confident at any point, stop and book a qualified engineer rather than risk injury or further damage.
Rather leave it to us?
- Fixed-price quote before any work starts
- Same or next-day visits where available
- UK-wide engineer coverage