Rank: Member
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Joined: 2/26/2009(UTC)
Posts: 10
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i get code 4 when i run diagnostic.i know this is fill code.i changed the
water inlet system
the water level switch housing
water valve assembly
and now just changed the control module.it still won`t run a cycle thru.the old module showed 2 hrs on all cycles except rinse and hold and that gets stuck at 8 min.the new module shows all the different cycle time but it only counts down a minute or 2,then the water level assembly then just constantly opens and closes.the plunger just goes up and down every couple of seconds just cycling water in and out.what else can it be?thanks for any help
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Rank: Member
Groups: Registered
Joined: 5/27/2009(UTC)
Posts: 7
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Hi Prop,
I have the same model and same issue you had--water keeps filling until the float switch trips, and then the machine goes into a 2-second fill-drain cycle. I replaced the control module and still get a Code 4. The water level sensor is working OK and its switch checks out, both at the switch and up at the control module. I checked all the control module wiring harness ohm readings per the troubleshooting manual--all are OK.
I could do what you did and change out the water inlet valve and the water level sensor assembly, but they check out fine and I suspect I would end up in the same corner you did.
Did you ever figure out what the problem was with your Bosch SHU5315?
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Rank: Member
Groups: Registered
Joined: 2/26/2009(UTC)
Posts: 10
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nope.i ended up getting a new dishwasher after having spent about $300 in parts,plus my labor.i have plenty of new parts if anyone wants to buy them ,cheap!!
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Rank: Member
Groups: Registered
Joined: 5/27/2009(UTC)
Posts: 7
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Thanks Prop!
I managed to stump a Bosch technician at the local appliance shop with this problem. The only possibility would seem to be a faulty module, but the chances of that are pretty slim. The code 4 is coming on as soon as the test program is run, before the water is even close to closing the water level switch. The switch is good, and even when I bridge the contacts the water keeps filling with power going to the water inlet valve.
I could have a chance at figuring it out if I had the wiring schematic. Apparently even the tech manual does not have the full schematic.
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Rank: Member
Groups: Registered
Joined: 5/27/2009(UTC)
Posts: 7
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Hi Prop,
Do you remember what the order of your component replacements was? You changed out the fill valve, control module, and the water level sensor. Did you do the water fill valve before the control module? I'll tell you why I am curious.
I am working with a very good appliance tech who has a theory on why your Bosch and mine gave a Code 4. He thinks that either an intermitent electric problem with the water fill valve solenoid, or a wiring short on that circuit fries a part of the control module. Thus, a new board can get fried in turn. Too much current draw on the water fill valve solenoid circuit would explain the problem.
Thanks for your help.
Tim
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