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my ferolli optimax hc 31 c boiler flashing a1?

my boiler is flashing a1 on screen pressure was high on 2 drained the valve to lower pressure now gone to 0 turned water pressure switch on to bring pressure back up now no water coming through & flashing fault f 21

jayne
February 2010
Heating, Home Heating Systems
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Mend Heating, Home Heating Systems

Worcester boiler dripping water?

Worcester boiler dripping water, can I just tight the screw? The icon next to the valve looks like radiators... [Read more]
Mend Heating, Home Heating Systems

Vaillant ecotec 831 plus?

Following a F22 fault where we had no heating and only cold water from the hot water tap, I topped up the syst... [Read more]
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My temp is showing on the reciever alot higher than it actually is & each time I turn the temp up to get the h... [Read more]
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Boiler cycle?

My boiler only fires up for about 90 seconds greenstar 4000
Mend Home Heating Systems
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Mend repair fix home heating systems