where can the pressure leak from in the pressure chamber

[pacst]

I've changed the pressure switch and the hotpoint wma32 still just keeps filling.
I've blown down the pressure chamber pipe and this will start the drum spinning, if I hold my thumb on the end the tube keeps the pressure switch activated and the machine continues through the cycle.

Where else could I be loosing pressure ?

 

[Sleepyhead]

Probably the pressure pipe itself.
Blowing into it will give a lot more pressure than normal so it will appear to be working ok. I'd try changing the pressure hose.