The Fault is an F1 fault. The pump motor does not always want to start and when it does it shuts down after a period time depending on when it last ran.It is currently in the heating mode . The CM capacitor has been leaking so I have replaced this with another 450volt 25uf cap. This has made no difference and the old cap did test ok. I have seen on the internet that this problem could be a water blockage. My first problem is that I cannot remove the back cover. Undoing the six side screws and the two in the handle recesses have released the cover but there is something at the top that is preventing the cover from lifting off. Can you send details of the screw locations and also details of the probable cause of the F1 error code. The user manual states its a that F1 is a pump failure.