Bosch SGS5342GB/17 FD8105 excessive cycle time,not draining

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  • #35745
    mpt600
    Participant

    The cycle time on 65, which used to be about 89mins, leapt up to 2H and stayed there. The Quick Rinse, which normally takes 13 minutes, started at 28, went down to 7, up to 21 then down to 1, stayed there and didn’t drain.

    I’ve searched this forum and discovered turbidity sensors. Does mine have one? And if so, where?

    We haven’t been using salt for a year or two since switching to 3 in 1 tabs. Is this part of the problem?

    Going to get some salt tomorrow and run it on 70C with dishwasher cleaning tabs and hope for the best. If this doesn’t work, any idea’s?

    Feel free to give me the idiots guide, it’d be much appreciated.

    #247878
    gegsy
    Participant

    Re: Bosch SGS5342GB/1,7 FD8105 excessive cycle time,not drai

    Hi
    Yes yours does have a turbidity sensor and running the hottest wash may just do the trick.
    Rinsing plates etc before loading will help also 😉

    Greg

    #247879
    gegsy
    Participant

    Re: Bosch SGS5342GB/1,7 FD8105 excessive cycle time,not drai

    If its not draining you will ned to remove pump inspection cover in sump.
    Remove filters and it will be on the LHS in recess, retained with a torx 20 screw.
    Remove cover and see if there is any foreign object in there 😀

    Greg

    #247880
    mpt600
    Participant

    Re: Bosch SGS5342GB/1,7 FD8105 excessive cycle time,not drai

    Thanks, Greg, for your response. Here’s the latest…

    Loaded up with salt and two dishwasher cleaners. Ran at 70 (hottest) but outside of door not that hot. Opened door and water was warm, but not 70 degrees. Shut door and instead of carrying on from where it left off, it reverted to 2H and started again. Ran it again with a dishwasher cleaner, and noted that the time ticks down, then sometimes jumps up again.

    On both occaisions it stuck at 1, with the dishwasher audibly still running. Did a reset, and it drained, with only an inch of water left in the bottom of the filter well. Is this normal?

    So, is this the dreaded error code 1? Does it mean it’s not heating? The interior of the dishwasher was warm, but not hot. The warmth may have just come from the pumps I imagine, as usually if I open the door mid cycle it’s like a sauna.

    I don’t know what to try next. I can measure the resistance of the element if that’s the next logical step, or are there more things to try first?

    Thanks again for your help.

    #247881
    gegsy
    Participant

    Re: Bosch SGS5342GB/1,7 FD8105 excessive cycle time,not drai

    Hi
    Its either going to be a crud blockage in the usual places and/or heater or module faulty.
    Heater should read app 20-30 ohms.
    It is also correct to have about an inch of water below the filters in the sump recess.
    The heat you are feeling is as you correctly said, heat from the wash pump having been on for an excessive time.

    Power off if you are to investigate :plug:

    Greg

    #247882
    mpt600
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    So where do you recommend I get in to check for blockages? Top? Bottom? Side?

    Had an Indesit that went wrong years ago, the engineer tipped it up and got in through the base. Where do I start with the Bosch? I hope it’s just a blockage…

    Ran a pre-rinse tonight, all went fine, but then I don’t think it has to heat the water for this.

    #247883
    mpt600
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    Ok, here’s an update; took the lid and sides off and on the left hand side there’s a plastic matrix, or manifold, a series of pipes. In the top left corner there is a build up of brown residue. There seems to be a red valve or something within the build up. What’s the best way of cleaning this out? Or will it have to be replaced? Or, the first question I should ask maybe, is it relevant to the problem?

    Thanks for all the help so far.

    Mike.

    #247884
    gegsy
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    Hi
    Ah yes the crud build up 😉 Yes is the answer the water matrix/water inlet will have to be replaced as the breather sounds choked up.
    Part is available by contacting spares@ukwhitegoods.co.uk quoting p/no 448903.
    This blockage and the following will also give you that dreaded 1 left in display.

    Other places of crud interest are the pressure chamber on LHS next to the water matrix, and also the ribbed clear transfer tube which o rings into said chamber and terminates into sump manifold at the front bottom.
    That tube can be removed and cleaned, the pressure chamber is a bit trickier and may also need replacing p/no 263186 also available from spares@.

    Greg

    #247885
    mpt600
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    Thanks for all your help.

    I cleaned out the matrix so the red breather valve now operates. I tried it on a wash but it just stays at 2H (for an hour, after which I reset it) and the water is stone cold. I’m thinking about checking the heater but can’t see it! Could the water be not heating because of blockages or is this something else? Water comes in and, if reset, drains out fine.

    #247886
    gegsy
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    Hi
    Yes insufficient circulation due to low water fill or whatever will give no heat.
    Heater is on the RHS behind panel FYI
    It is a heaterbox not the usual looking element looking 😉
    Power off first, yea 😀

    Greg

    #247887
    mpt600
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    Ok, sorry to be a pain but I’ve had a look in the right hand side, and I’m still not sure if I’ve found the heater. To the left is the motor, to the right of that is an oval shaped white plastic fitting with a red wire one side, some earths etc. Is that the heater unit? If so it’s o/c between red and earth. Can you confirm if this is the heater, and if so where should I measure?

    Thanks again!

    Mike.

    #247888
    gegsy
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    Hi
    Ok that is the heater but you should be reading off the two main spades either side of the safety switch on the heater, you can’t miss them. They will have earth tag/s around each one of them FYI.
    Red wire to one side and white/green to the other.

    Greg

    #247889
    mpt600
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    Sorry Greg, mistook white/green for earth. But yes, it’s open circuit.

    So my next question is; is changing the heater straight-forward? I’ll go check out the price of a replacement.

    #247890
    gegsy
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    Heater is defiantely not straight forward on these.
    Its the access room thats the problem and its a devil of a job TBH.
    IMHO it would be better to seek pro help on this one, see repairs@ on the LHS for your nearest engineer 😉

    Greg

    #247891
    mpt600
    Participant

    Re: Bosch SGS5342GB/17 FD8105 excessive cycle time,not drain

    Greg, thanks for all your help on this one, it really is appreciated.

    The replacement heater is £70, you can get a three year old Bosch on ebay for £50 or less. So that’s what I’m doing. Shame, really, as I hate waste, and if Bosch supplied the heaters at a better price I could keep mine going for a few more years.

    But anyway, thanks again.

    Mike.

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