WMA1512W. Customer complained that washes are now taking a lot longer (2 1/2 hours). I initially checked the heater, NTC etc which were OK. On trying the machine I found it was over-filling, though I switched off before it stopped filling as it was well over half way up the glass. I checked the pressure vessel and hose which were OK. I blew into the hose and there was only one click from the pressure switch. When it was draining I heard the pressure switch click. Also, when filling the drum starts to agitate after a minute or so, suggesting that a given water level has been detected. I took a pressure switch from a scrap machine and that also only made one click although further investigation with the meter reveals there are 2 levels, the second being silent. Is this second level for control or is it an emergency level?