Use the adjustment buttons to reach your desired heat.
This light is green when the system is on standby and turns yellow when hot water is being actively used. tgc bc901h manual
Use the Up and Down arrow buttons to set your desired heat. The default factory setting for the first use is typically Use the adjustment buttons to reach your desired heat
For safety, if the heater is in "standby" (unused) for more than 10 minutes, temperatures previously set above 50°C will automatically reset to 48°C for the next user. Technical Support tgc bc901h manual
If you cannot locate your immediately, follow this generic safe setup procedure that applies to 90% of TGC BC901H models.