Optimus H-4438 Electric Heater

Question

I have the H-4438 model but I am having the same malfunction as described in reference to the H-4436 model. It power's up then a few seconds later the alarm signal lights up. No heat is being generated but as described with the H-4436 model, the heater still rotates. Is there a reset button? In case either there is no reset button or resetting doesn't do the trick, what would be the next step in fixing this problem? Please help, it's very cold where I live.