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Hi,just fitted a smoke detector to my 5 year old 6400 alarm.Instructions not very good.When alarm is set off by pir or door contacts dose the smoke detectors built in siren sound as well.I am asking because I did not want to test it and have the alarm phone out.(c.u.siren set to on) Regards Bill.

The fan on this boiler has always run all the time.Now fan switches off when hot tap opened or central heating calling for heat.Flames visible through site glass then boiler shuts down.Any ideas please

Hi all,After looking on the grundfos web site for a replacement for my 15/60 pump I purchased a UPS2,it told me it was a direct replacement.I could use the old body and just change the motor.Looking at the instructions (page 5) it shoes the pump in a vertical position pumping upwards,i need it...

hi all, Its my second boiler in 40years.The first was a potterton c55/16,the current one is a potterton kingfisher 2,gravity hot water,pumped heating.The pump was a grundfos super 4-50 single speed.When I tried to adjust the variable adjustment arm it started to leak,so after 40years I fitted a...