Wall-hung boilers are common heating devices in households, providing a warm environment for families. However, sometimes boilers may encounter faults, among which E8 fault is relatively common. Here is how to handle E8 fault in wall-hung boilers.
1. Check the Exhaust Fan
When an E8 fault occurs, the first step is to check whether the exhaust fan is functioning properly. The exhaust fan is an environmental device responsible for expelling the waste gases produced during combustion in the boiler. If the exhaust fan malfunctions, it can lead to poor flue gas discharge, resulting in an E8 fault. Check for any unusual noises or blockages in the exhaust fan, and clean it if necessary.

2. Check the Flue Pipe
An important factor related to the exhaust fan is the flue pipe. The smoothness of the flue pipe directly affects the operation of the exhaust fan. If the flue pipe is blocked or has accumulated dust, it may prevent the exhaust fan from working properly, leading to an E8 fault. Therefore, when addressing the E8 fault, it is also necessary to check the condition of the flue pipe and clean it if needed.

3. Check the Burner
In addition to the exhaust fan and flue pipe, the burner is another potential problem area. The operation of the burner directly affects the performance of the exhaust fan. If the burner malfunctions, it may also cause poor flue gas discharge, resulting in an E8 fault. Therefore, it is essential to check the operational status of the burner and ensure it is running normally while troubleshooting the E8 fault.

4. Investigate Other Possible Issues
Besides the exhaust fan, flue pipe, and burner, the E8 fault may also be related to other components malfunctioning. For example, issues with the exhaust fan sensor, control panel, and other parts may cause the E8 fault to occur. Therefore, during the fault investigation process, it's important to check other components of the wall-hung boiler to identify any potential faults.

If the above methods do not resolve the E8 fault in the wall-hung boiler, or if the user is unable to conduct the troubleshooting and repair, professional assistance should be sought. In such cases, it is advisable to contact the after-sales service center or find a professional boiler repair technician to carry out repairs and replace any faulty components.
In summary, handling the E8 fault in wall-hung boilers is not particularly complicated, but it does require certain professional knowledge and skills. Users should ensure their safety when troubleshooting to avoid any accidents caused by improper operation of the equipment. If faced with unsolvable issues, seeking professional help is a wise decision. We hope the methods provided in this article assist users encountering E8 faults in their wall-hung boilers, enabling them to restore the boiler's normal operation promptly.