Re: Fisher Paykel dishdrawer.
Hi Simon,
They are all probably DD603h models, The one that wont empty will be a blockage at the rotor motor or a damaged rotor motor, it should be fairly easy to fix.
The one with the top drawer not working at all, if it is dead check the resistance values of the heater, it it goes open circuit it kills all power to the top drawer.
As for the one that is tripping it will be a leak into the base probably, check the lid motors are working OK, if they are cream in colour then they are originals and are the ususal culprit, if they are black then they have been changed and should be OK.
I have sent you some reading material.
HTH
John