: Ensure the gas valve is fully open and the gas supply is not interrupted. Try turning the tap off and on again after 10 seconds to reset the ignition sequence.

Before diving into the nitty-gritty of the TGC BC901H manual, let's cover the basics:

Remember that while this article mirrors the official manual for most BC901H versions, always defer to the printed safety labels on your specific unit. If you encounter a persistent problem not covered here, reach out to TGC’s technical support with your error code and serial number.