Liquid Heater FAQ

During operation, liquid heaters can encounter some issues that can cause them to malfunction. We've compiled five common causes and solutions for these problems, hoping they'll be helpful!

1. Poor Piping

Solution: Open the air bleed valves on the heater and piping to release the air. This will usually resolve the problem. (Note: There must be no large bends in the piping, otherwise circulation will be disrupted.)

2. The heater isn't functioning properly at first use

Solution: Ensure the heater's water valve is open and that the heater rotates smoothly. The first time the heater is installed and operated, it may not function properly due to the lack of oil in the oil pipe. It should function properly after a few attempts. The glow plugs and fuel vaporizer screen generally don't require cleaning. However, if the heater is dripping oil, smoking, or failing to burn, remove the glow plugs and vaporizer screen, reinstall them, and then restart the heater.

3. If the heater's water circulation is poor during operation, the heater body will overheat. At this point, the manual reset thermal fuse on the heater will automatically trip, stopping the oil supply and allowing the heater to cool gradually.

Solution: If this occurs, check the heater water pipes for unobstructed flow and whether they are compressed. Then, press the thermal fuse reset button in the center of the rubber cap and restart the unit.

4. The indicator light does not illuminate when the heater is turned on.

Solution: Check the main power supply, the heater fuse, the wiring harness for good and secure contact, and the control box for damage.

5. If the heater fails to burn or burns erratically, and there is no oil dripping or smoke coming out of the exhaust port, check the oil pump and pipes for blockages, looseness, or leaks.