I have made a loaf of bread and prepared another because it turned out so well. I left the ingredient in overnight but did not use the timer function. When I turned it on and set it to the settings and pushed start, I got the (--H) displayed in the screen. The Manuel says it means it is to hot. Several times I have unplugged it removed the tin and left it. I also wiped out the few crumbs that were present. It still responds the same. Is there anything else I can do? Is it broken?