Chinese Diesel Heater basic maintenance and cleaning

This is a basic maintenance and repair on a Diesel heater. It doesn't really matter tribe brand, they're all very similar. My unit was throwing all sorts of codes, and it seemed to be a different codes every time. I replaced the temperature sensor as well as the glow plug and it was still throwing codes. There is a maintenance/ repair kit for your unit, but I won't include links as they are all slightly different and I don't want to steer you in the wrong direction.