Clogged heat exchanger (tankless) or dirty flame sensor (gas tank). Manual solution: Tankless owners must run a descaling solution (vinegar) through the unit for 45 minutes. Gas tank owners: Clean the flame sensor rod with fine sandpaper.
Automatically regulates the incoming water flow rate to match the heating capacity. xyfb water heater manual
Most XYFB units have a small screen filter where the cold water enters. Shut off the water, unscrew the connection, and rinse the screen with water to remove debris. Clogged heat exchanger (tankless) or dirty flame sensor
Includes water/electricity isolation, leakage protection, and over-temperature automatic power-off. Automatically regulates the incoming water flow rate to
Connect the cold water inlet (usually blue) to the main water line.
The XYFB water heater is an efficient, compact appliance designed to provide reliable hot water. This comprehensive manual covers essential steps for installation, daily operation, safety protocols, and troubleshooting. Safety Precautions