What dose error code F18 in my Broch Exxcel washing machine mean

SOURCE: bosch exxcel 1200 express

need more info what point in the wash does it start to display the code

SOURCE: We have a bosch washing machine and cannot open the filter

If the filter will not unscrew there is an object preventing it from doing so. There are two options to fix this. Firstly try turning the filter one way then the other to try to dis lodge the item. This usually works after a few attempts but if not you will have to remove the large black pipe from the pump and try to remove it from there. There will be some water in this pipe!
Hope this helps.
Thankyou for using Fixya.

SOURCE: bosch wae24363 washing machine, coming up with f17 error code please help

I had this same message last week. It is to do with the water intake (i.e. the water coming in to the back of the machine). If you have checked that the hose isn't trapped or kinked, unscrewed it and checked the filters at each end for blockages (rinse out if necessary), and you still get the F17 message, it may be because your water pressure is too low, in which case you need to contact your landlord (if you rent) or thames water if the problem is external (especially if there are any works going on near your house). Hope this helps!

SOURCE: I have a Bosch Exxcel washing machine which is

Switch machine on but do not program.
Press and hold PREWASH button.
After a few seconds it begins beeping.
Keep holding PREWASH button in until beep gets quiet
then eventually stops.
Hope this helps - Colin, Billericay Essex

SOURCE: what is the error code f21 means on a bosh

F21 relates to a motor or control board fault.
However, it is also caused by spikes in the mains and can be spurious.

To reset it.
Turn the appliance knob to the off or reset position, 12 o'clock.
Turn the knob to the 6 o'clock position.
Press and hold the spin button.
Whilst holding it, turn the knob to the 7 o'clock position.
Continue holding the spin button for about 5 seconds.
Release the button.
Turn the knob to off.
When your turn it back on it should have cleared the error code.