Speed control not work - constantly on high

KMX50 would start and accelerate to high speed, then slow down some with fairly erratic speed. I tried changing the triac on the main speed control board, then also the whole board (£45). It made no difference.

The only other component I realised it might be was the speed control board which is on the rear end of the motor under the main cover (I found this component on a site selling Kenwood parts, and was where I got the main board from, which is how I know it's speed control). When I inspected it I found two of the terminals broken. You had to look very closely to see they were broken. It's a poor design as the three legs of the terminals are quite long, and very thin, so on high speed when kneading there is much vibration, which is why I suspect the terminals broke. I cut them back just enough to resolder. The component isn't quite fully inside the sensor wheel on the motor shaft, but it still picks up sufficient signal to control the speed and now works fine. Haven't tried it under load yet, but no reason to think it won't work correctly. So check this before ordering a £45 board!

Hi Emma,
Not going to be much help here to be honest. We have the KM020 and this is the only problem we have had with heavy machine use in 4 years - and a minor issue at that.
This place is good for spare parts http://www.buyspares.co.uk/

If you're in the UK, you can call this number 02392 392 333 and give them your post code, they'll let you know who the local service agent is.
All the best,

Firstly, I think you mean "flour".
Put in your ingredients. Cover the mixer, head and bowl, with a dishtowel. Turn on mixer to "stir" (or lowest speed). But! Mix only for 1 or 2 seconds. Repeat this, with bowl covered, until flour is mixed in enough not to fly out.
Happy baking!

hi its not necessarily the motor but could be some capacitors on the speed control unit ( the control knob is attached to it) spares are reasonable to buy .you can find a dealer from kenwood.co.uk website..

sounds like aproblem with the brushes are worn out or damaged armature if you contiue to use it before you check the brushes you will permetly damage it

if you have max speed you have to replace the .1uf capacitor the 2 spring loaded screws serve far fine adjustment

Hello. your Kenwood Major is A707 ?

the new attachment for front and high speed outlet, not fit in A701/707 ..

Please visit our web site Kenwood Chef Restore in download section. you can download the compatibility of attachments
Regards

What model is your Kenwood ? to Kamalsalman

A901 models change triac and capacitor .. or centrifugal broken

also check if another's components is faulty.

Kenwood Chef Restore

Do you find the motor running too fast at the lowest setting? Then you need to bring it to someone to adjust the low speed setting. If you are preparing double batches you are over loading the mixer and/or using too fast a speed setting to mix. Don't try to double recipes just because the bowl can handle the volume, the motor cannot and will not last very long if stressed mixing dough frequently.

Thank you for your time. I contacted the Kenwood company in England.