Hisense dishwasher F12 error code
What F12 means on a Hisense dishwasher
Water inlet or fill fault.
Meaning checked by NAC's engineers, 9 November 2026.
What our engineers say
This code on a Hisense dishwasher points to a water inlet or fill fault. In plain terms, the dishwasher is not taking in water as it should, so it stops the cycle and shows the code. You may also notice it not filling, a water supply warning, beeping or flashing lights, or in some cases no power at all or water not draining away.
Engineers sometimes find that the safety inlet hose, which carries water into the machine and has its own valve built in, has failed. They sometimes find the main control board at fault as well, and a failed inlet hose and a faulty board can turn up together. Now and then the cause is a blocked chamber that senses the water level, a faulty switch in the side water tank, or a loose tank nut and its seal.
An engineer typically tests the inlet valve and the power reaching it, checks the control board, and looks for blockages. They usually replace the inlet hose or valve, the control board, or the side tank parts. Parts often have to be ordered and fitted at a later visit.
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
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