It took a little bit to get everything figured out. The instructions are a translated version and the translation doesn_ always make sense. All the error codes you can find the fixes on YouTube. Mine only runs on the highest setting well, if I try to put it on a low setting it loads up and I had to tear it down and clean the burn chamber. For the money you can_ beat it and it burns very little diesel for the heat you get. I used mine in my snowmobile trailer and it_ worked great. I would recommend for a camper or something that needs a thermostat, but if you can use either on or off I would recommend. I_ going to buy another one to heat my small shed.