Unfortunately it seems that there is either a blockage after the pump, or the pump itself has failed.
The only way we will know for sure is to take the hose and the pump out.
This requires some dismantling of the machine and then testing of the pump with a multimeter.
You may feel at this point, that you would prefer to call in someone. If so, I always recommend you ask neighbors and friends to recommend someone to you, rather than picking someone from the phone book!
If you do this yourself, please let me know how you get on and the outcome.
A word of warning, pleas do not turn the machine over, as you will likely damage some internal components. You should only work with the machine in the upright position
If you need more help, please just ask.
In the meantime,
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If you need to ask me anything after rating, please just follow the link in the welcome email