Hi Guys,
I fitted a vaillant 415 in march with new cylinder pump and plan. Client recently contacted me saying each time she starts the boiler, after 5 mins of it being on (either heating or HW) a vibrating noise comes from the an area between the boiler a 1 perticular rad (she thinks its the boiler). It only happens from cold and lasts for 20 mins. Each time I arrive it has stopped and the occasion I arrived and started it from cold it did not happen, but I know it is happening because I heard it over the phone.
All the valves are new and obviously 2 way..I cant imagine it being air as the pump would be screaming wouldnt it? Any ideas anyone?
I fitted a vaillant 415 in march with new cylinder pump and plan. Client recently contacted me saying each time she starts the boiler, after 5 mins of it being on (either heating or HW) a vibrating noise comes from the an area between the boiler a 1 perticular rad (she thinks its the boiler). It only happens from cold and lasts for 20 mins. Each time I arrive it has stopped and the occasion I arrived and started it from cold it did not happen, but I know it is happening because I heard it over the phone.
All the valves are new and obviously 2 way..I cant imagine it being air as the pump would be screaming wouldnt it? Any ideas anyone?