Bosch SMS50C12UK not starting – Error E:19

[RichAB]

Hi All. I have a Bosch SMS50C12UK Dishwasher. It’s giving me error code E:19 when turning on and not starting. I read elsewhere that this may be a problem with the heat exchanger solenoid. I’ve replaced this (old one was giving me resistance of 16 ohms, new one is 7K ish), but the error is still there. Haven’t looked at any of the power/control PCBs yet but would appreciate any pointers on what to look for next

Thanks

[electrofix]

well if the old one gave 16 ohms that would worry me. at that resistance it would blow the control traic on the board

Dave

[RichAB]

Thanks. I’ve now had a look at the PCB under the microscope. Nothing obviously burnt out. Where would I find the Triac? All I see on the board is a couple of darlington arrays, a 5V reg and what looks like a micro..

[electrofix]

are you looking at correct pcb, at bottom rear where the mains plug goes in ?

Dave

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