Well Frank didn't actually have a melted fan. Found two vaporised diodes. I guessed they weren't able to cope with the extra load running at 28v, but when I removed the other two and looked at the specs, they were rated 100v 1a. Since I keep some nice fresh dc power to hand (car battery booster), I fired up the motor and it spins, but slowly and pretty soon glows red hot. Not good. Target are sold out of the cheap poppers, so now I need to work out how to get a zombie roaster into operation. I already have a couple of ideas.
