I have an old Kenwood Chef model A701A, when using for mixing it will suddenly change to fast speed without me touching the speed dial.

The contents are then thrown across the kitchen.

Any polite advice please?

Kighill, October 2011

This is a bit of a guess but could it be to do with heat. I once had a Kenwood chef where the Triac component had gone. it ran at full speed all the time. I changed the triac and one of the capacitors and it worked fine.

Maybe the triac (translation: speed controller) is on the blink and when it gets hot lets too much current through (hence max speed).

Here is a link to another thread which discusses a similar problem.

http://www.howtomendit.com/answers.php?id=68470

Ben, November 2011