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Hi, I just bought a 2nd hand Kenwood Chef A701A. It is working, the speed can be adjusted from one to max. However, there is burning smell but no smoke. How should I check on the motor and what to change? Appreciate your reply.
My mom has one of this kenwood a701a for 24 years now. First hand and only. I remember, that all my life smell that “burning cable” or “charcoal” when she turned on the machine, no matter the speed, it always will have that smell. Today i plug the machine, to tested it after 8 years of no use, and that smell stills there. Remind me my childhood. Dont worry. Some of those a701a naturally smell like that. (sorry for my bad english) Cheers from Buenos Aires, Argentina!!!
The burning smell is unlikely to be the motor. Google for “Kenwood Chef A701 speed controller repair” Try http://howtomendit.com/answers.php?id=45… The most likely source of the burning smell is a failing capacitor of overheated resistor, but those two links will give you more details. Repair is relatively simple, but you will need to replace some components, and the ability to solder is required. These machines, unlike their modern equivalents are designed to be relatively easy to service.
The smell is the smell of ozone produced by the sparking brushes. Quite common around old brushed electric motors. ozone in high concentration is injurious to health
Hi @marty313, If you have the Kenwood Chef A701 or A701a, here’s the service manual that may help. It has complete service instructions, a parts list and a wiring diagram. Hopefully this is of some help.
The burning smell is most likely coming from the main power resistor on the speed control circuit. It is a 450 ohm, 15 Watt, wirewound resistor which becomes quite hot in use - more so at low speed. A slight odour is not a fault. Sparking from the motor brushes and/or speed control contacts can also result in a slight electrical smell. If the machine has been heavily used it could be worthwhile getting the motor cleaned and serviced to prolong life.
