I wanted to reach out regarding a peculiar issue I've been experiencing with my heating system, and I'm seeking your expertise for guidance.
I have a combi-boiler located downstairs, with the tank and motorized valves situated upstairs, specifically two zones and hot wanter. Recently, I've observed that once the heating is switched off, both valves emit a humming noise for approximately 10 seconds after the light indicator goes off. Concerned about potential valve problems, I promptly had them replaced. Initially, after the replacement, the system was tested and the noise seemed to have disappeared. However, to my dismay, the humming noise resurfaced about 2 hours later.
It's worth noting that there is no noise when the hot water valve is in operation.
I've checked the pressure on the gauge, and both the gauge and boiler are within acceptable limits. To provide you with a clearer understanding, I've attached a photo of my hot press.
I'm at a loss as to what the next course of action should be. Your insights into this matter would be immensely appreciated. If you require any additional information or clarification, please feel free to ask.
I have a combi-boiler located downstairs, with the tank and motorized valves situated upstairs, specifically two zones and hot wanter. Recently, I've observed that once the heating is switched off, both valves emit a humming noise for approximately 10 seconds after the light indicator goes off. Concerned about potential valve problems, I promptly had them replaced. Initially, after the replacement, the system was tested and the noise seemed to have disappeared. However, to my dismay, the humming noise resurfaced about 2 hours later.
It's worth noting that there is no noise when the hot water valve is in operation.
I've checked the pressure on the gauge, and both the gauge and boiler are within acceptable limits. To provide you with a clearer understanding, I've attached a photo of my hot press.
I'm at a loss as to what the next course of action should be. Your insights into this matter would be immensely appreciated. If you require any additional information or clarification, please feel free to ask.
