i'm also in South Africa, Cape Town, i have a well looked after Prefamac tempering machine to sell.
If you wish to have more info please contact me at email@example.com
N early four years after the first post in this thread, I find I too had a similar issue with Mol D'art - purchased 2 x 12kg machines, the first one died after 1 day, and they suggested I just open it and look at the wiring...it was sent back for repair in the end, which took around 2 - 3 weeks.
Just after it arrived back, my 2nd machine also died - they said so unusual for two to fail it must be power surges or something wrong with my power supply. My electrician took a look inside, said it had been re-wired, the thermostat was 'average' and had failed, and this failure could not have been a result of the power surge. He tested my factory and said I had stable power, and some thing wired into the Distribution Board absorbed/prevented power surges.
When the machines are going, they are good to work with, but my electrician could not believe what I paid for these given they were so cheap inside. I think I am just unlucky to have 2 failures...none of my other melters (Matfer) have had issue, nor has any of my other equipment, some very specialised.
I just cancelled a further order of 2 x 6kg from Mol D'art, as they were not very helpful. So I have a different brand melter coming, and will hope it goes a little better than the Mol D'arts, which I am not sure I would buy again.