Tricity Bendix DH101 Stops Mid cycle no water filling?

My Tricity Bendix DH101 Does not run a complete cycle, it seems it is not filling with water, I have read about the hose that runs into the (im guessing its an) Inlet valve on the back of the machine the blue hose, to remove it and blow up it. I have done this a few times and it has worked, it uses to get it working for a few cycles, then I had to start blowing for every cycle and now it does not work anymore, any other ideas or could it be the inlet valve itself that may need replacing, if it even is an inlet valve.

Thanks in advance.

Tom
August 2010