Machine sounded normal but dishes on top shelf unwashed. Bought inlet valve from espares (phenomenal delivery speed) and replaced but no change. Pump sump relatively clean and circulation motor sounds normal but water flow much reduced. Water sprays poorly from bottom arm and insufficient pressure/flow to spray from top arm. No blockages in arms. With arms removed water flows from base outlet but insufficient volume/pressure. Motor capacitor looks OK. No sign of blockage on inlet or outlet to pump. Can blow air back through pump. Suggestions please before I buy a (rather expensive) circulation motor.