I do not use a thermostat, I just have an on off switch in its place. Earlier today when I left I flipped the switch off, and I noticed it sounded like a fan or something was running that normally isn't. The stove had just run out of pellets so it was shutting down anyway. I definitely noticed something sounded different, but I didn't think much of it. When I got home I filled the hopper, flipped the switch on and I get nothing. No noise, no red call light, just nothing. I'm not even sure where to start. Any ideas for me?