called to this washer dryer last week with error f15(dryer heater relay),changed module from emw and that sorted the f15 fault but it then came up with error f4(pressure switch stuck on empty)pump running continuously.checked pressure switch seems ok,checked pipework for blockages seems ok.anyone else had simular problem.
Remove the PCB and tighten all the edge connectors. Also get a new pressure switch – they burn internally for a passtime and at around £6 it’s a cheap fix. I’ve fitted quite a few of them…. 😉