Bosch Dishwasher - E09, No heating - Case of Blown Control Board.

[@firmbutton6485]

Did you repair this pcb or buy new?

[@theoracle6005]

Hi
Did you test the heat pump terminals 2 and 3rd terminal (red wires) - it should be 20ohms.
If it's open circuit then you get E09. The pump price in Australia is $220 and about 1.5hrs to remove and install/test.
I would give this a go before looking at PCB

[@theoracle6005]

I replaced the pcb the board to fix the issue

[@firmbutton6485]

@@theoracle6005 I have made repair on the pcb, but although it’s filling now, the heater is still not working

[@theoracle6005]

@@firmbutton6485 I would say check the heater on the heat pump and replace if necessary

[@pawelw.9172]

Isnt it that there are two relays because the pcb is universal and one relay is for a pump heater and the other one for a zeolite heater? It sounds logical to me... there are 5 pins coming out of the board and dishwashers without zeolite dont utilize all of them.

[@theoracle6005]

Well the zeolith is in the heat pump.
2 pins activate the coil and 3 pins - Normally open, Normally closed, and common

[@pawelw.9172]

@@theoracle6005 no zeolith has a separate heater

[@theoracle6005]

Does you unit have a dryer as well ? If so there is an additional zeolith.

[@theoracle6005]

If my knowledge serves me right the zeolith is a printed heater around a round metal surround

[@pawelw.9172]

@@theoracle6005 zeolith minerał has a separate tank and a heater in it.

[@arvinbaba]

I wonder if we could see the heater element inside pump.

[@theoracle6005]

Yeah you can remove the clips holding the motor housing to see the element. Once disassembled the sealing integrity is compromised and the whole heat pump should be replaced

[@arvinbaba]

@@theoracle6005 thanks, do you know about diagnostic menu in SMS seriese ? There is no any guidance about it

[@theoracle6005]

There is very little information, but when u replace the board it has a diagnostic startup