Hello guys.
We have Baxi Bermuda back boiler and from few day when fireing up CH or HW there is metalic knocking noise like on the metal sheet for about 1-2 min then stops and same again when fireing back, I have took fireplace cover off and can tell it's coming from heat exchanger, any help...
Right will try explain better,
When CH or HW fires up for about 2 min. There is a knocking metalic (like bending metalic sheet or knocking on metalic sheet) sound coming from heat exchanger what's sits above burner and then stops untill fire goes off and fires back up then starts again...
Hello guys.
We have Baxi Bermuda back boiler and from few day when fireing up CH or HW there is metalic knocking noise like on the metal sheet for about 1-2 min then stops and same again when fireing back, I have took fireplace cover off and can tell it's coming from heat exchanger, any help...