What F06 actually means
The dishwasher has measured the water getting too hot — 77°C or above — and has shut the cycle down.
On this Y-series platform the temperature sensor (the NTC) is read continuously throughout every programme, not only during heating. If the reading reaches 77°C or more at any point, the machine abandons the cycle and shows the fault, with the lights blinking alongside the display. In practice the water is often not actually that hot — the sensor itself, or its wiring plug, is giving a false reading.
What F06 looks like on a White Knight dishwasher
Most people find this page having searched for what the machine is doing rather than the code itself. On a White Knight dishwasher, F06 usually shows up as one or more of these:
- Dishwasher door won't open
- Door won't lock or click shut
- Door lock light flashing
- Door stuck shut with the load inside
- Won't start even with the door closed
- Dishes coming out cold and wet
- Not drying the load
- Water not heating up
Recognise any of those? That is this fault, and the rest of this page explains what causes it and what you can check yourself.
What usually causes it
- Faulty NTC temperature sensor giving a wrong reading
- Loose or corroded plug on the sensor wiring
- Heating element or its relay staying on when it should switch off
- Genuine overheating of the water in the tub
What you can safely check yourself
Work through these in order. Anything beyond this — panels off, testing parts, anything to do with the wiring — is an engineer's job, and not one to attempt with the machine plugged in.
- Switch the machine off at the wall for a minute, then power it back up and start a short programme — if the fault returns straight away it is not a one-off glitch
- Note whether the door and dishes feel unusually hot when it stops, as that tells the engineer whether the water really is overheating or the sensor is lying
Which White Knight models show F06
F06 means the same thing on this model. If yours is not listed, the explanation above still applies — the code is set by the control board, not the model number.
WK-AT45FSDW
Common questions about White Knight F06
What does F06 mean on a White Knight dishwasher?
The dishwasher has measured the water getting too hot — 77°C or above — and has shut the cycle down. On this Y-series platform the temperature sensor (the NTC) is read continuously throughout every programme, not only during heating. If the reading reaches 77°C or more at any point, the machine abandons the cycle and shows the fault, with the lights blinking alongside the display. In practice the water is often not actually that hot — the sensor itself, or its wiring plug, is giving a false reading.
Can I fix White Knight F06 myself?
There are 2 checks you can safely do yourself first.
- Switch the machine off at the wall for a minute, then power it back up and start a short programme — if the fault returns straight away it is not a one-off glitch.
- Note whether the door and dishes feel unusually hot when it stops, as that tells the engineer whether the water really is overheating or the sensor is lying.
This one usually needs an engineer once you have tried them.
How much does it cost to repair White Knight F06?
£66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.
Tried the checks and it's still showing F06?
This one usually needs an engineer once you have tried the checks above. Then it wants someone who can open it up.
What it costs, before you call: the price is the same whatever the fault turns out to be — £66 including VAT for an engineer to come out and diagnose it, or £84 in total including VAT if it is put right on the visit and no parts are needed. Any parts needed are quoted on site before we fit them — you decide. Every repair carries a 90-day workmanship guarantee.
Our own engineers, not a call centre. We cover Nottinghamshire, Derbyshire and Leicestershire — most dishwasher faults are seen same day or next day.
Call 0115 648 0929 Book online — postcode and number is all we need
Outside our area? The explanation above still stands — take it to a local engineer and tell them the code. Knowing it saves them time and you money.
Other White Knight dishwasher codes
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- White Knight F02 — The dishwasher has spotted water flowing into the machine at…
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- White Knight F04 — The dishwasher has asked for water but the flow meter isn't …
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