What F07 actually means
The dishwasher has decided the water isn't heating up as it should, so it has stopped the programme rather than carry on washing cold.
On this Y-series board the control watches the water temperature during the heating part of the cycle. If, after the first stretch of heating (around 420 seconds in the figures), the temperature reading hasn't climbed as expected — or the reading looks implausibly high — the machine flags F07 and abandons the programme. In practice you'll see the cycle stall part-way, the display or lights flashing, and dishes left wet and greasy because the water never got hot.
What F07 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, F07 usually shows up as one or more of these:
- Not filling with water
- No water going in
- Takes for ever to fill
- Stops right at the start of the cycle
- Overfilling, or won't stop filling
- Stops with water still inside
- Fills and drains over and over
- Dishes coming out cold and wet
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 the board a false or dead reading
- Failed heating element, so the water genuinely never warms up
- Break in the wiring or connector between the sensor/heater and the control board
- Control board misreading the temperature signal
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.
- Turn the machine off at the wall for a minute, then switch back on and run a short hot programme — this clears a one-off reading and tells you whether the fault is permanent
- Make sure the machine is plumbed to the supply it was installed on and the tap is fully open, so it isn't starting from an unusually low water level
Which White Knight models show F07
F07 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 F07
What does F07 mean on a White Knight dishwasher?
The dishwasher has decided the water isn't heating up as it should, so it has stopped the programme rather than carry on washing cold. On this Y-series board the control watches the water temperature during the heating part of the cycle. If, after the first stretch of heating (around 420 seconds in the figures), the temperature reading hasn't climbed as expected — or the reading looks implausibly high — the machine flags F07 and abandons the programme. In practice you'll see the cycle stall part-way, the display or lights flashing, and dishes left wet and greasy because the water never got hot.
Can I fix White Knight F07 myself?
There are 2 checks you can safely do yourself first.
- Turn the machine off at the wall for a minute, then switch back on and run a short hot programme — this clears a one-off reading and tells you whether the fault is permanent.
- Make sure the machine is plumbed to the supply it was installed on and the tap is fully open, so it isn't starting from an unusually low water level.
This one usually needs an engineer once you have tried them.
How much does it cost to repair White Knight F07?
£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 F07?
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 F03 — The dishwasher isn't getting the water it expects, or it can…
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- White Knight F06 — The dishwasher has measured the water getting too hot — 77°C…
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