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Thread: Indesit DIF16B1UK fill error fix

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    DDY
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    Indesit DIF16B1UK fill error fix

    Quick one, just so it's recorded on the Internet somewhere. Hopefully save someone from an expensive call out, or a dishwasher from the bin.

    My two year-old Indesit DIF16B1UK dishwasher that came with the house suddenly had a fault where a wash cycle would start but error out a few seconds after filling starts. It would then fill to the max, drain completely, start filling, error alarm, fill to the max, drain... etc over and over.

    Error beeps are three beeps, followed by a single beep every few seconds.

    All six green mode lights would blink, the salt and rinse aid lights remain off.

    I opened up the left panel (facing the dish washer head on), the right panel doesn't need to come off.

    Towards the back is a translucent plastic component, the bottom of which has a tiny circuit board that measures flow by detecting the magnet on the turbine, inline with the mains water inlet behind it.

    In my case, the reed switch contacts were corroded. Taking the circuit board out of the translucent plastic enclosure, and testing the resistance across the reed switch, using a magnet to close the contacts, showed high resistance when closed.

    To verify, I used a jumper wire to short the connection to the circuit board, I mimicked the expected open-close behaviour or the reed switch being magnetically actuated by the turbine, basically opening and shorting the jumper intermittently. While doing this, the dishwasher filled normally, and when I stopped, the dishwasher would give me the error beeps.

    Confident that I've made the correct diagnosis, I searched for the correct part and found the translucent plastic assembly is a common spare part

    "Indesit dishwasher air break turbine" part no. C00256546

    I couldn't find the circuit board on its own. I didn't have any reed switches in inventory and figured the safest thing to do would be to order the whole C00256546 assembly since it wasn't too expensive and comes with the circuit board. Decided to go for a non-genuine part, fairly simple bit of kit, very little to go wrong and half the price of a genuine one. I paid £16.75 delivered on Ebay.

    A useful tool to have is a slip joint plier with jaws that can do around 80-100mm - use this to grip the plastic lock ring in the inside of the dishwasher to unscrew and release the air break turbine assembly. Don't forget to clean the sealing surfaces between the assembly and dishwasher before you attach the new part (under where the sealing ring goes), lots of crud accumulates here.

    You'll also need a new 18mm-ish hose clip, a jubilee clip works well, to replace the old hose clip on the inlet hose which is one-time use and no good after removing it.

    Put it all back together, run a test cycle, check for leaks. etc

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    Super Moderator Jonj1611's Avatar
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    Re: Indesit DIF16B1UK fill error fix

    Good job! Problem is with a lot of devices is people don't want to "have a look" and see what's wrong. Have you seen the nightmare of a modern car engine these days! Even Haynes manuals are like 10 pages long now with most chapters saying "Refer to dealer".

    It's good to see someone having a look, finding the fault and making a repair. I myself am guilty of getting an engineer out for a washing machine leak which turned out to be something stuck in filter.

    I am sure once the page is indexed there will be someone out there who will stumble across this page looking for that exact fault
    Jon

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    Re: Indesit DIF16B1UK fill error fix

    Nice one!

    Our kitchen had an Indesit dishwasher when we moved in, and by the time I got rid of it I had replaced various nozzles and sealing washers with 3D printed bits to keep it going, and the badly designed power switch was glued in with a reinforcing piece after it disappeared into the door one day. Last time it broke down though, I replaced it with a Beko which has been trouble free and much quieter to boot.

    I mean, a reed switch? Have we warped back to the 1970s??

    Quote Originally Posted by Jonj1611 View Post
    Have you seen the nightmare of a modern car engine these days!
    I saw a poor bloke in a van stranded at the side of the road yesterday (nasty place to break down), and he had the bonnet open. My first thought was, "you won't find anywhere in there to plug in your laptop if you want to know what's wrong."

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    Re: Indesit DIF16B1UK fill error fix

    It never ends.

    Third major failure of this 3.5 year old dishwasher.

    Second (after the last one I posted here) was a bit simpler, the dishwasher wouldn’t start sometimes and would also sometimes stop intermittently. I could get it to start or resume a stopped wash after a good slam of the door. Replaced the door switch, problem solved.

    This time, the third failure, the dishwasher would stop mid-cycle, drain and give the error light sequence: mode lights 1-4 solid yellow, and the power button blinks rapidly. I couldn’t find anything reliable online for the meaning of that light code, with different websites telling me different things. I had a suspicion what this one was; for the last year or so the recirculation pump noise was getting louder and louder, making a kind of chugging sound, almost like a diesel engine bus was idling outside the house.

    I figured the pump would need to be replaced at some point anyway so I looked for a replacement on the Indesit parts website:
    https://parts.indesit.co.uk/dif16b1u...howCode=true/p

    I had to double check what pump I had because it turns out there are multiple versions of the DIF16B1UK, of which use either one of two pumps – from their appearance I’m confident they’re not cross compatible.

    Of course the one I needed was the more expensive of the two possibilities… part number was C00731573

    I punched that in to Google and ended up buying one for about £85 delivered from ransomspares.co.uk, vs £150 on the Indesit website. The pump that arrived turned out to be from the same OEM as the original as opposed to a 3rd party manufacturer, so that was nice.

    This time, access was via the right hand side panel (viewing from the front), for better access I tipped the machine on its left side and also pulled out the bottom sump (the thing which detects leaks – be sure to disconnect the attached float switch, and reconnect when done!)

    Pump comes out by twisting it off the heater enclosure, fetid water will gush out, have a rag handy! Make sure to remove the old O-ring and thoroughly clean the O-ring seating surfaces, mine were caked in solidified fat and sand – the kind of stuff that will cause leaks if not removed.

    The pump came with two O-rings, of which only one is needed, install that were the old one was and twist the new pump on, making sure the O ring stays where it should be.

    Put it back together and test etc. So quiet now!

    Doing an autopsy on the old pump – a brushless three phase AC pump with a floating impeller and permanent magnet. The bearings are graphite bushes, one on each side of the magnet. The impeller-side bush also restrains axial thrust, it is secured to a plastic cap which encloses the magnet section of the whole pump.

    The cap has small openings to equalise pressure, which I reckon is what caused the pump to fail - small particles making their way past the cap and getting in to and prematurely wearing down the graphite bushings. Both bushes were heavily worn, such that there was about 1-2 mm of radial and axial play! I do wonder how it managed to work for so long in that state!

    The new pump has larger openings in the cap, but covered with a fine mesh screen. Good.

    As my Google search failed to find any conclusive fix given the symptoms. Here’s the conclusive fix, now on the Internet hopefully for others to find and save some time, and another appliance from the bin maybe.

    Bring on the next failure…
    Last edited by DDY; 21-02-2024 at 09:54 PM.

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    Re: Indesit DIF16B1UK fill error fix

    Quote Originally Posted by DDY View Post
    It never ends.
    Well done!

    I had forgotten the joys of Indesit ownership
    Our Beko integrated dishwasher wasn't cheap (about £450) but continues to just competently wash dishes, so I must admit I'm still glad I gave up and replaced the Indesit. From memory I think it was the pump going was my final straw on that.
    The washing machine died in a fairly spectacular manner not long ago. The drum bearing went, and I suspect the drum thrashing around did secondary damage during its death throes as the error message was a stuck valve I suspect it could still be repaired, but it had lasted about 10 years with I think just a motor brush replacement (yeah, who uses brushes these days??) so seemed worth replacing. The new Samsung is awesome.

    That leaves our Bosh tumble dryer, which I have always though was utter rubbish. A matching Samsung to go with the washing machine would be lovely, but these days they are all fancy heat pump units and wow those cost. I haven't seen any power usage figures to work out if we would ever get the money back vs our old vented model, but it would be nice to have a tumble dryer that reliably dried clothes.

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    Re: Indesit DIF16B1UK fill error fix

    Quote Originally Posted by DDY View Post
    It never ends.

    Third major failure of this 3.5 year old dishwasher.

    Second (after the last one I posted here) was a bit simpler, the dishwasher wouldn’t start sometimes and would also sometimes stop intermittently. I could get it to start or resume a stopped wash after a good slam of the door. Replaced the door switch, problem solved.

    This time, the third failure, the dishwasher would stop mid-cycle, drain and give the error light sequence: mode lights 1-4 solid yellow, and the power button blinks rapidly. I couldn’t find anything reliable online for the meaning of that light code, with different websites telling me different things. I had a suspicion what this one was; for the last year or so the recirculation pump noise was getting louder and louder, making a kind of chugging sound, almost like a diesel engine bus was idling outside the house.

    I figured the pump would need to be replaced at some point anyway so I looked for a replacement on the Indesit parts website:
    https://parts.indesit.co.uk/dif16b1u...howCode=true/p

    I had to double check what pump I had because it turns out there are multiple versions of the DIF16B1UK, of which use either one of two pumps – from their appearance I’m confident they’re not cross compatible.

    Of course the one I needed was the more expensive of the two possibilities… part number was C00731573

    I punched that in to Google and ended up buying one for about £85 delivered from ransomspares.co.uk, vs £150 on the Indesit website. The pump that arrived turned out to be from the same OEM as the original as opposed to a 3rd party manufacturer, so that was nice.

    This time, access was via the right hand side panel (viewing from the front), for better access I tipped the machine on its left side and also pulled out the bottom sump (the thing which detects leaks – be sure to disconnect the attached float switch, and reconnect when done!)

    Pump comes out by twisting it off the heater enclosure, fetid water will gush out, have a rag handy! Make sure to remove the old O-ring and thoroughly clean the O-ring seating surfaces, mine were caked in solidified fat and sand – the kind of stuff that will cause leaks if not removed.

    The pump came with two O-rings, of which only one is needed, install that were the old one was and twist the new pump on, making sure the O ring stays where it should be.

    Put it back together and test etc. So quiet now!

    Doing an autopsy on the old pump – a brushless three phase AC pump with a floating impeller and permanent magnet. The bearings are graphite bushes, one on each side of the magnet. The impeller-side bush also restrains axial thrust, it is secured to a plastic cap which encloses the magnet section of the whole pump.

    The cap has small openings to equalise pressure, which I reckon is what caused the pump to fail - small particles making their way past the cap and getting in to and prematurely wearing down the graphite bushings. Both bushes were heavily worn, such that there was about 1-2 mm of radial and axial play! I do wonder how it managed to work for so long in that state!

    The new pump has larger openings in the cap, but covered with a fine mesh screen. Good.

    As my Google search failed to find any conclusive fix given the symptoms. Here’s the conclusive fix, now on the Internet hopefully for others to find and save some time, and another appliance from the bin maybe.

    Bring on the next failure…
    Firstly, well done for actually investigating and fixing this. I really wish that more people could be bothered to try to understand how to fix their appliances so waste would drop hugely.

    Secondly, it seems that the next fix will be to begin the return process under the Consumer rights act 2015. Whilst the retailer can deduct some of what you have paid for the use you got from the product, conversely you can charge them for your time and money wasted as a result of the faulty product. This applies any time up to 6 years after you bought the product.
    "In a perfect world... spammers would get caught, go to jail, and share a cell with many men who have enlarged their penises, taken Viagra and are looking for a new relationship."

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    Re: Indesit DIF16B1UK fill error fix

    We should really be in a technological age where white goods last for decades and are always repairable and partially upgradable. Shouldn't that be one of the strengths of 3D Printing?
    They just seem to get worse and barely last the warranty, and it doesn't matter if presented as premium model.

    Thankfully so far, I've only had to do a very minor repair to the dishwasher where the plastic flaps to release the rinse aid and tablet disintegrated. For whatever reason the plastic the flaps are made out of seem wildly different than the rest of the backboard they're attached to. They'd become very brittle and when i scooped up the bits they continued to break in my hands. I could get away with a faulty tablet flap by simply placing a tablet somewhere inside the dishwasher, but the rinse aid I couldn't live without especially as things start to rust without it.
    At first the only thing I could find was the whole back board mechanism which would have cost loads and been a nightmare to replace. Thankfully with perseverance I found some used plastic flaps and it ended up being a very easy and cheap repair.

    I try to do as much research as possible into mechanical/electronic faults as the way I see it the more information you can obtain where it turns out to be impossible to carry out the fix yourself, you'll be able to provide useful information to a technician. This could help making the job cheaper as hopefully you've given them a head start of parts to bring and less time on site.

    With a recent car fault by looking online I've hopefully saved myself a small fortune by learning that my car has a common fault with the instrument cluster and can send it away to someone to get repaired, rather than paying for a whole new cluster, or wasted hours and cost of diagnostics in a garage.

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