Another smoking Kenwood Chef A901E sorted in time for Christmas…just

Another Kenwood Chef gets the treatment in the Workshop

How about another Kenwood Chef story?  I know I’ve covered this machine a few times now, but I’ll try and make it as interesting as I can.  I just LOVE Kenwood Chefs.

IMG_7700
FixItWorkshop, December’18, Worthing, Kenwood Chef A901E on the bench.

A customer got in touch with me via the FixItWorkshop ‘contact us’ link asking if I could fix his family’s much beloved Chef.  While last in-use, it started smoking and smelling terminal.  How could I refuse.  I’m located in Worthing, but the customer was based in North London, quite a distance for a repair and would have been usually cost prohibitive using the Royal Mail.  However, using local drop-off points, carriers such as Hermes and DPD offer (slightly slower) courier services for about £7.00 one way, which starts to make more fiscal sense.  This is what we did.

I wish I’d taken a photo of the box the Chef came in, because the customer had clearly gone to a lot of effort to make sure it was well protected!

On with the repair.

The Chef has been in production many years and although they can often appear similar on the outside, they do vary on the inside, depending on the year of manufacture as small tweaks and improvements are made.  Evolution, rather than revolution, usually the backbone of any successful design.

The A901E is different from the previous A901 as it features an electronic speed controller, rather than a centrifugal affair.  While the later design is an improvement, it wouldn’t deter me from buying an earlier model; the improvement is small.

The A901E still features similar components to previous models which can and do fail, especially with age.  The subject here is about 30 years old, give or take.

IMG_7678
FixItWorkshop, December’18, Worthing, A901E, motor removed.

The motor on the A901E comes out quite easily; first remove the motor cover, remove the mains cable (disconnect first of course), remove the top cover, belt, then the four screws holding the motor in.  The motor then pulls down from inside, out through the gap left by the hinge.  Easy.

The motor circuit board showed traces of component catastrophe with dust and dirt left by exploding components.  Nasty.  Pre-empting the fault, I ordered a repair kit before I’d taken the machine apart, together with replacement feet as the ones on this machine were knackered.  The kit includes capacitors, resistor and triac as these are the main components that tend to fail.

These kits are available on eBay and are worth the money as they are often cheaper than buying the components separately and they contain instructions for newbies.  Here’s a little slide show showing the process.

This slideshow requires JavaScript.

 

With the kit fitted, the motor re-installed, mains reconnected, the Chef ran well again, this time without burning or smoking.  However, all was not well as the speed control was a bit wobbly at lower speeds, which was just plain wrong.  Having worked on a good few Chefs, this problem is usually down to excess end-float on the motor spindle.  Working with the motor still in situ, the motor fan, which controls end-float could be adjusted with an Allen key.  Sorted.

Just the replacement feet to fit and after a quick clean-up, the Chef was reassembled, ready to go home.

A top tip for you.  If you intend to replace the feet on your machine and you probably should if they are old as they go hard or fall apart, then soak the area around the feet recesses with WD-40 or similar a day or so before as this will make getting the remnants of the old feet out, much easier.

Cost of a replacement:  £400 up.  Cost of repair:  £12.65 plus my time and tea.

Gaggia Classic machine wakes up to smell the coffee.

A Gaggia Classic Coffee Machine repair…

A simple repair…. That’s what I thought when a friend asked if I could look at his Gaggia Classic Coffee Machine, which had developed a nasty little leak when in use.  The coffee wasn’t all that good either, due to the lack of pressure available, caused by the leak.  In short, it needed attention.

IMG_3616
FixItWorkshop, Oct’17, Gaggia Classic Coffee Machine, with a leak.

The owner had already bought a repair kit consisting of the main seals/ gaskets that commonly fail, so I thought no problem, take to pieces, replace seals, happy days.  Er, not quite.

Once I’d stripped the machine down, pretty straightforward on these machines, the bare parts were exposed, which revealed the problem.  After being fired up briefly, not to make coffee I’d like to point out, water could be seen escaping from the boiler unit, a alloy bodied lump of metal, split in two halves, held together by 4 screws.  The boiler, as the name suggests, heats the water up with one heating element  and creates steam for the steam wand, with another element, all part of the same module.

After separating the boiler halves, I traced the leak to a faulty gasket, but crucially, one side of the mating faces was heavily corroded and unlikely to re-seal with a new part fitted on its own.  Remedial action was required.

This model is a few years old and a replacement boiler is still available on a few websites and prices vary from £40 to £60 at the time of writing, so at that price, starts to make the cost of repair unviable.

I decided that the face with the corrosion had enough material to withstand loosing some, so went about sanding the worst of the corrosion away before gradually moving on to  smoother and smoother sandpaper.

Because Gaggia Classics are fairly common, I decided to video this repair process as I suspect the corrosion affects many machines with age and just fitting a repair kit won’t cure the problem on its own.  See below.  I hope it helps anyone else with the same machine facing the same problem.

 

Once I was happy with the new finish, I fitted a new gasket and reassembled the boiler.  After putting it all back together, I purged several tanks of water through the system to remove debris, before attempting a cup of coffee.  Once filled up with my favourite Lidl coffee, the machine performed well once again with no leaks and the end product tasted great.

Cost of a new machine:  £249.00.  Cost of repair:  £4.50, plus time.

 

 

Raucous Kenwood Chef A701a

A noisy Kenwood Chef A701a gets a gearbox rebuild.

This Chef had been sleeping quietly in a kitchen cupboard for some time before being woken up to make cake mixtures once again.  The owner had owned the mixer for many years from new and was sentimentally attached to it.  I fully sympathise, they’re great machines.  It had been used many times in the past and then packed away as new machines came and went.  Having decided that there was still a place for the A701a, it was fired up.

The owner didn’t remember it being quite as noisy and wondered if something was wrong with it.  She got in touch and brought it in to the workshop.   After listening to the mixer at varying speeds, we agreed that perhaps it was a bit noisy and that further investigation was required.

 At this stage I must confess at this repair has been on the bench for a long while..!

I think the A701 is my favourite Kenwood Chef product as it’s very elegant, beautifully proportioned and almost over-engineered.  It comes from a time where built-in obsolescence was a swear word.

White removed
FixItWorkshop, Oct’17, Kenwood Chef, A701a.

On with the problem.  After disconnecting the gearbox by removing the drive belt, I checked the motor for general wear and tear, the brushes and speed control mechanism and I concluded that it all seemed OK and working smoothly.  The gearbox however did seem a bit noisy when turned manually, nothing hideously graunchy, but a little rough.  To be honest, it would have probably survived, but I wanted to open up the gearbox to make sure that it was as it should be.

Whilst removing the Chef’s casing around the gearbox, I’d noticed traces of grease around the joints and various power take-offs.  All models seem to do this to an extent, but this one seemed to be quite bad.  Closer inspection revealed that some of the grease had escaped out of the seal between the two halves of the gearbox casing.  Opening up the casing revealed that the grease that was left had been pushed to the corners of the space within the gearbox and that the gears were a bit dry, this was probably the root cause of the noise.  The planet wheel that drives the beater was also bone dry.

Luckily, there are plenty of suppliers who can supply rebuild kits for Kenwood Chef gearboxes, including new gears and grease.  The gears in this seemed serviceable, but it seemed very sensible to replace the lubricant with the correct 130g of Kenwood gearbox grease, which is food safe.  I used ‘Kenwood Chef Restore’, an eBay seller and the kit was a reasonable £10.99, including P&P.  The kit included the main gearbox grease, white grease for the planet gear and sealant for the gearbox casing.

IMG_4570
FixItWorkshop, Oct’17, Kenwood Chef A701a, repair kit from Kenwood Chef Restore, eBay.

Before replacing anything, the first job was to clean out all traces of the original grease which had gone very sticky and was contaminated with general wear.   The first pass clean involved using paper toweling, followed by water and detergent, before a final clean with brake cleaner, which removed the last few traces of grease and dirt.

With the gearbox refilled and resealed making sure the spacers were re-fitted to the correct parts, the drive belt re-fitted with just enough slack, the gears sounded much sweeter with the final parts of the casing reassembled.  One last point to note is that I used silicone sealant on the blender attachment power take-off plate in replacement to the one fitted, since the original seal was well past it (see below).

As a finishing touch, I replaced the existing machine feet which had turned to mush with replacements from Sussex Spares (eBay shop) for a very reasonable £2.70, delivered.

The Chef was now ready to prepare cake mixtures again.

Cost of new machine: £300 and up.  Cost of replacement parts: £13.69 (plus my time).

 

Kenwood Chef A901 -a fishy story!

If your Kenwood Chef A901 starts to smell of burning, don’t despair, it can usually be saved.

I had an enquiry via this site from a fisherman who was very upset that his trusty Kenwood Chef A901 had given up the ghost.  Rather than using the Chef to make Victoria sponges, it had been used to prepare fishing bait.  It just demonstrates how versatile these machines are.

Kenwood Chef A901
FixItWorkshop, Oct’17, Kenwood Chef A901 with motor speed control fault.

Whilst it was in use, the owner witnessed a bang then the smell of burning before the machine came to a halt.  The plug was quickly pulled!

Whilst discussing the fault on the phone, I suspected that the fault was probably due to the failure of the motor speed control circuitry, which is known to fail with age.  I had carried out similar repairs to other machines, including my own (in this blog) so agreed to take a look.

I received the machine quickly and upon inspection, the machine had obviously been cared for and considering its age, was in good condition.  The smell of burned-out components was clear, lifting it out of the box.

Dismantling the machine and removing the motor on the A901 is fairly straightforward, providing you allow time and make notes on where things go.  The components that need to be replaced are very accessible and anyone with moderate soldering skills would be OK with this task.

Luckily, the Chef is very well supported by long-term aftermarket suppliers and I bought an off-the-shelf spares kit at £14.10 delivered, from KAParts (www.kaparts.co.uk) via eBay, featuring upgraded components.  This kit is a little dearer, but component technology has moved on since this machine was first on the market, so fitting anything else is a false economy in my opinion.

With the old components removed and replacements fitted, the motor ran smoothly and fully reassembled, the machine is now ready to mix bait mixtures once again.  Lovely.

Cost of a new machine: Circa £300 and up.  Cost of repair:  £44.10 (kit plus my time).

Here’s a little video I made of the repair.

Enjoy.

 

Samsung S4 mini GT-i9195 -cracked screen

I take on a phone screen replacement

I’ve never replaced a phone screen before, but since there’s a wide range of spares at reasonable prices available out there, I decided to take on this repair for a friend.  The screens on these and other smart phones are fragile.  They are made of finely machined glass, made to extremely high tolerances and therefore susceptible to damage from knocks and scrapes.  At this point usually, I might whinge on about how manufacturers do this deliberately to some extent, to bolster built-in obsolescence, but on this occasion, the break was due to the owner falling off his bike (off-road) and the phone hitting the deck, while in his pocket.  I’m amazed the damage wasn’t worse.  No hospital treatment for the owner on this occasion, just bruising and a dent to his pride.

The repair kit for such damage came in at a reasonable £8.99 and the eBay vendor promises to have the kit within a couple of days.  I’m sure you’ll all be waiting with baited breath to know how the repair goes.  I will of course keep you all updated.

WP_20170811_13_06_24_Pro
FixItWorkshop, Aug’17, Samsung G4 screen replacement.

Stay tuned.

17/08/17

The repair kit has arrived and there are lots of components in the box.  After watching a few (very good) YouTube videos on the S4, I think I’ll need a clear evening to repair the phone…

26/01/18

Opening up the phone’s back, just a plastic over, only 1 small screws held the phone together as ‘layers’ sandwiched together.

After separating the screen from the main body of the phone, it quickly became clear that the screen was in fact OK and it was the digitiser (digitizer in the U.S.) that has cracked and failed.  This meant that a new one was required, but after a conversation with the owner, we decided that the phone was now beyond economical repair.  New digitisers are available for the S4 at the time of writing.   The phone will be disposed of using an electronic recycling scheme.

Cheap Tesco DVD player

This cheap and quite frankly nasty DVD player came in as a dud unit.  No lights on, nothing.  To be frank, not even I thought it would cost in to repair it, since the owner told me it didn’t cost more than £20 in the first place.

Never mind, off with the cover and a quick poke around with the multi-meter revealed no power coming from the transformer within the unit.  This converts high voltage from the mains to lower, safer voltages for the player.  On this DVD player and many others I’m sure, the internal processes are broken up in to ‘cards’.  On this unit, there’s a power card, a logic card for the motor drive and a video card for the picture.  Closer inspection of the (cheap and horrible) power card revealed several faulty components, which had failed catastrophically.  At first glance, I suspected that the cost of replacing individual components wouldn’t cost in and that sadly, this DVD player might be headed for the bin.

Fear not!  With the power of Amazon, I was able to find a generic suitable DVD power card via China that fitted, with a small amount of wiring for £5, delivered.  Job done.

Here’s a video of the fix.

 

 

 

 

 

Dyson DC33 repaired in the workshop

A Dyson DC33 gets treated to a new motor

Conked out Dyson DC33

This Dyson presented with a pretty terminal case of ‘no go’.  The owner had run this relatively new machine in to the ground with little maintenance so it was little wonder what happened next.

Whilst in use, the machine spectacularly went bang and tripped the main fuse board of the house.  The noise and following smell was quite something I was told.

The owner had nearly rushed out and bought a new machine and was budgeting between £300 and £400 for a replacement.

IMG_3207.JPG
FixItWorkshop, Worthing, Feb’17. Dyson DC33 motor replaced

I was glad I could help since I was fairly certain I knew what the problem was without seeing it.  After giving the cable, switches and casing a visual inspection, it was time to delve deeper.  The filters were in poor condition and the general smell of it indicated that overheating had been an issue, probably leading to premature wear on the motor.

With the motor out, the true extent of the damage became apparent.  Both motor bushes had worn away to nothing and part of the brush holder had broken up inside the motor, probably while it was running, causing the noise.

I suspect that the owner had ignored the warning signs of burning smells and occasional cutting out (as the thermal overload circuitry performed its fail-safe role).

Being only a few years old, the owner had a couple of options; either replacing the faulty part with a genuine Dyson replacement (a very reasonable £40) or pattern motor kit with filter pack for under £25.  The owner chose the latter on the basis of the machine’s age and the fact that both filters in the machine were also ruined.

The job took an hour, including testing before the machine was back performing its cleaning duties once more.

A note to all vacuum cleaner owners (that don’t take bags):  Keep your filters cleaned every couple of months or so.  Your machine will last much longer if you do.