DESPERATE..... Displays fault code F18 frequently.Have cleaned the filter 3 times now recently(in the last 3 days) and is very clean but stopped again.Just emptied ll washing out of it and spun it to

Sump hose has fallen off Unplug tilt machine back have a look underside to check also could be the soap dispenser hose Hole in it.This rubs away on side of machine 5yrs old.

This might help you with the pump its on a bosch Please remember to subscribe to our YouTube channel for all appliance tutorials
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Hi davidandsall,

Before it can Spin (The last part of any cycle), it would need to drain the water first. Your machine is stock on that particular position, most likely because of a clog in the Drain Filter compartment.
You will need to clean it.

Please follow my below Tip on how to do it:

ACCESS, DRAIN & CLEAN THE DRAIN PUMP FILTER

Kind Regards d")

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F18 error code means that the filter is blocked.

Look around for a propeller shaped part, it should be able to spin freely. If not, remove the debris so that it is unblocked.

Hope this helps (remember to rate and comment this answer).

If this is an outdoor spa near trees, its almost a guarantee that the impeller is blocked with debris (pine needles can cause this in a hurry)

If the impeller is clean of debris and this is still happening, replace you pressure/flow switch.

Hi from retired Englishman in SW France,
Bosch 'F18' decodes as 'pump/drain out time' so I would gently suggest as a first step that you clean the drain motor lint tray/filter. So many 'faults' are caused by blocked filters and many machines will not even go to spin or release the door lock if there is any water still left inside.
Here are my comprehensive guidance notes for checking both the drain motor filter and the drain motor ;-0)
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If you are unsure where the filter is, it is often behind the front lower (kick) panel (or in some machines at the rear in an awkward position!) and most are held in by a round cover/knob. Sometimes the filter will not come out with the cover and you will have to persuade it to come out to play!

REMOVE POWER AND ENSURE YOU HAVE A WATER RECEPTACLE/RAGS TO SOAK UP THE WATER WHICH IS BOUND TO POUR OUT!
It's surprising what people have found in theirs! It is always worthwhile checking it on a regular basis.
Now- whilst the filter is removed it is normally possible to see the drain motor and ensure it is not jammed by a foreign object such as a needle or a toothpick. It should be able to be turned by hand/finger- the power IS OFF!
At this point it is also possible to test if the motor works. No clothes or water in the machine, select a spin cycle and put the power back on. You should be able to see the motor turning at some point, possibly straight away. If it doesn't work then the motor is malfunctioning!

Hope the filter is the problem and good luck!
John C

check wire connector for damage or short

wtha is F 12 ????

I also had this problem - the machine was full of water and it flashed up F18. I had to drain the water out of the machine using the small pipe located next to the drain filter. There was loads of water to drain out. I used my oven roasting tray which was perfect for the job. Then I undid the screwcap filter. There was a lot of really black water that came out, along with about two pounds worth of coins and some hairgrips. Now my machine works perfectly !