I have the Fisher Pykel dishdrawer only 2 yrs old. Problem I have with it is it will not empty out the water after a cycle, but the hoses are not blocked!
You say hoses - plural so I assume you have the double drawer model. Which drawer will not drain & how do you know the hoses aren't blocked? It could be a control module fault, a faulty rotor or the non return valve inside the drain hose.
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