Wall-mounted boilers are one of the main devices for heating modern homes. However, sometimes we may find that the boiler can provide heating normally but fails to supply hot water for domestic use. Here are some reasons why a wall-mounted boiler can function correctly for heating but not for providing hot water.
1. Water Pressure Issues
One common reason for a wall-mounted boiler providing heating but not hot water is water pressure issues. The boiler requires a certain water pressure to operate correctly; if the water pressure is too low, the boiler may not be able to activate the domestic hot water system. Typically, the water pressure in a wall-mounted boiler should be between 1.0 and 1.5 bar. If the pressure is too low, we can adjust it using the pressure gauge on the boiler. Generally, the pressure gauge should indicate within the green zone during normal operation. If the water pressure is low, we can add water through the faucet or filling valve located under the boiler.
2. Faulty Hot Water Valve
When the wall-mounted boiler provides heating but fails to deliver hot water, it is possible that the hot water valve is malfunctioning. The hot water valve in the boiler is responsible for controlling the flow of hot water, and if it encounters issues, hot water will not be supplied normally. In this case, we need to contact a professional technician for repairs or replacement of the hot water valve.
3. Faulty Hot Water Circulation Pump
Another common reason is a malfunctioning hot water circulation pump. The hot water circulation pump is a crucial component of the boiler's hot water system, responsible for delivering hot water to the required locations. If the circulation pump fails, hot water cannot be supplied properly. We should seek a professional technician for maintenance or replacement of the hot water circulation pump.
4. Faulty Hot Water Storage Tank
Another possible reason for a wall-mounted boiler providing heating but no hot water is a fault in the hot water storage tank. Some wall-mounted boiler systems include a hot water storage tank to store hot water for use when needed. If this storage tank malfunctions, hot water will not be delivered properly. In this situation, we need to consult professional technicians for repairs or replacement of the hot water storage tank.
In summary, the reasons why a wall-mounted boiler provides heating but no domestic hot water can vary, including water pressure issues, hot water valve failures, hot water circulation pump failures, and hot water storage tank faults. Regardless of the cause, it is essential to diagnose and resolve these issues promptly to ensure the boiler operates correctly and provides comfortable heating and hot water for the household. Additionally, regular maintenance and servicing are vital to effectively prevent such problems from occurring.
