Hi all.
Initially had a heating engineer round to look at our Vokera 24/96 Flowmatic boiler which had hot water but was firing up only for roughly 15secs and then cutting out with no heat going to radiators. He replaced the pump which seemed to work for 2 hours, but after this reverted back to previous symptoms. Got plumber back and he briefly mentioned a seemingly "not worth fixing" diverter valve problem and tried to sell a new boiler as the only option, so thought to leave him and investigate it myself with the maintenance instructions. I'm an engineering student so do have a fair bit of knowledge even though non-specific.
A few days later and the boiler does not ignite at all. I traced this to be caused by the flow microswitch lever not moving inwards enough to release due to the pin not retracting fully (only about 2mm short of required amount to make switch - can manually manipulate switch inward by this small amount so that boiler can ignite). When I manually release switch lever for CH radiators come on but are very slow to heat up in comparison to the first, could this be related?
In addition HW is only functioning properly with CH demand.
Pump and fan seem to be running, pressure 1.5 bar.
Any help would be greatly appreciated.
Andy
Initially had a heating engineer round to look at our Vokera 24/96 Flowmatic boiler which had hot water but was firing up only for roughly 15secs and then cutting out with no heat going to radiators. He replaced the pump which seemed to work for 2 hours, but after this reverted back to previous symptoms. Got plumber back and he briefly mentioned a seemingly "not worth fixing" diverter valve problem and tried to sell a new boiler as the only option, so thought to leave him and investigate it myself with the maintenance instructions. I'm an engineering student so do have a fair bit of knowledge even though non-specific.
A few days later and the boiler does not ignite at all. I traced this to be caused by the flow microswitch lever not moving inwards enough to release due to the pin not retracting fully (only about 2mm short of required amount to make switch - can manually manipulate switch inward by this small amount so that boiler can ignite). When I manually release switch lever for CH radiators come on but are very slow to heat up in comparison to the first, could this be related?
In addition HW is only functioning properly with CH demand.
Pump and fan seem to be running, pressure 1.5 bar.
Any help would be greatly appreciated.
Andy
