1. The fan does not work or has abnormal sound: firstly, check whether the screws of the fan are loose. If it can be tightened or replaced, if the fault still exists, the whole fan needs to be replaced.
2. Water pressure problem: insufficient water pressure is a common reason why the wall-hung boiler can't heat water, which can be solved by opening the water inlet valve.
3. Low hot water temperature or no hot water output: If the wall-hung boiler does not output hot water or the hot water temperature is low, first check whether the water temperature setting is correct. If it is correct, check whether all water valves are open and whether the air in the system is exhausted.
4. Wall-hung boiler leaks: If you find that the wall-hung boiler leaks, you can check whether the water valves are all closed first. If there is no problem, you need to check whether the drain pipe or water pipe is damaged or aging.
5. Fault code of wall-hung boiler: When the wall-hung boiler fails, different error codes will be displayed. You need to check the specific meaning of the corresponding fault code in the manual first, and then carry out the corresponding maintenance. If you encounter an unsolvable fault, you'd better ask professional wall-hung boiler maintenance personnel for maintenance.
The above are some common maintenance methods for wall-hung boilers. If you encounter other more complicated problems, it is best to choose professional wall-hung boiler maintenance personnel for maintenance.