Standard forum question perhaps, but here goes...
I have a Glow worm Economy Plus 50FF. It is connected to a primatic DHW cylinder. I have 2 circuits each with a 2 port MV and a seperate pump (Grundfos UPS15/50). All pipework is in 8mm.
When the boiler fires from cold, everything appears to work well and quietly. The heating and hot water both work.
As the water warms, a whistleing noise occurs. I have an airvent at h/l above the boiler. The whilstling only occurs when the burner is firing.
My limited logic says;
Heat exchanger;
blockage causing kettling (although Im not convinced)
WAterside leak somewhere
Fan:
leaking seal so when burner firing (and subsequently fan), there is a leak there.
Distribution:
air vent at h/l malfunctioning
I'm seeking;
1. Ideas for the obvious checks or causes from known experience
2. a method to fault find this problem
I have a Glow worm Economy Plus 50FF. It is connected to a primatic DHW cylinder. I have 2 circuits each with a 2 port MV and a seperate pump (Grundfos UPS15/50). All pipework is in 8mm.
When the boiler fires from cold, everything appears to work well and quietly. The heating and hot water both work.
As the water warms, a whistleing noise occurs. I have an airvent at h/l above the boiler. The whilstling only occurs when the burner is firing.
My limited logic says;
Heat exchanger;
blockage causing kettling (although Im not convinced)
WAterside leak somewhere
Fan:
leaking seal so when burner firing (and subsequently fan), there is a leak there.
Distribution:
air vent at h/l malfunctioning
I'm seeking;
1. Ideas for the obvious checks or causes from known experience
2. a method to fault find this problem
