Dishwasher water supply warning showing: what our engineers find
These figures come from NAC's own repair records: 198 dishwasher jobs our engineers attended for this fault. Here is what they found, what fixed it and what it typically cost.
When a dishwasher shows its water supply warning, such as a lit or flashing tap symbol, the cause is most often water that has collected in the base of the machine. This sets off the safety device that stops it flooding your kitchen, so the dishwasher refuses to fill and may keep its pump running in an effort to drain.
An engineer will usually clear the water from the base and then run the dishwasher while watching closely for any leak. Sometimes no leak shows at all and the machine works normally again. Engineers sometimes find that washing up liquid or the wrong detergent has caused too many suds, or that blocked spray arms or a build up of grease have sent water where it should not go. In those cases a thorough clean is often enough, and you may be advised to rinse plates and use a dishwasher cleaner.
Now and then the engineer traces the water to a worn door seal, a leaking pump or a faulty valve. That part then usually has to be ordered and fitted at a second visit, after which the dishwasher is tested again to make sure the leak has stopped.
Written by our engineers from these jobs.
- Jobs attended
- 198
- Confirmed repairs
- 108
- This is not a success rate. Jobs inside their 60-day window, jobs still being classified, jobs held for review and visits that didn't end in a repair aren't counted.
- Fixed at the first appointment
- 32%
- about 3 in 10 of our repairs
- Typical total paid by customers
- £108 to £244
- including parts and VAT, from 107 repairs
What's usually behind it
The causes our engineers found and fixed, as a share of our 108 confirmed repairs for this fault.
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Anti-flood activated by water in base: about 1 in 4 of our repairs, from 29 jobs.
27%
We only list causes with enough repairs behind them, so the shares won't add up to 100%.
Error codes we see with this fault
- AEG I10: Water inlet or fill fault.
- Hisense F12: Water inlet or fill fault.
- Lamona E01: Anti-flood protection activated: water detected in the base.
- Lamona E02: Water fill fault: the appliance is not filling.
- Miele F12: Water fill or flow fault.
- Miele F70: Anti-flood protection activated: water detected in the base.
- Neff E14: Water intake or flow meter fault.
- Neff E15: Anti-flood protection activated: water detected in the base.
- Samsung 4C: Water inlet fault: no water entering the appliance.
- Siemens E15: Anti-flood protection activated: water detected in the base.
- Bosch E15: Anti-flood protection activated: water detected in the base.
By brand
Brands with enough repairs of their own for this fault to show separately.
Bosch dishwasher water supply warning showing
107 jobs, 57 confirmed repairs. Customers typically paid £108 to £249 (from 57 repairs). 32% fixed at the first appointment.
This is not a success rate. Jobs inside their 60-day window, jobs still being classified, jobs held for review and visits that didn't end in a repair aren't counted.
No single cause has enough repairs behind it yet to show for Bosch.
Why the first-appointment figure differs by brand. Our engineers carry common parts on the van, so those repairs can be finished at the first appointment. Other parts have to be ordered in, and fitting them takes a second visit.
About the price. £108 to £244 is the typical total paid by customers, including parts and VAT: the middle half of what customers paid on 107 of these repairs. Repairs paid for by manufacturers and insurers aren't counted, because that work is charged at contract rates. It's a guide, not a quote. Your engineer confirms a fixed price before any work starts.
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.
- 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