Glowworm Fuelsaver 55F / No Central Heating

[minimunchie]

I have glowworm 55f boiler with potterton EP2000 controller switch .The radiators all have microbore pipework.
The central heating fires for about 1 minute and then cuts out.
System worked when we moved in 2 months ago,since then I have had to shut off the hot water from the main hot water tank and also the cold water mains supply.
Could I have induced air into the system?
There is a pump under hot water tank which appears to be working and I have bled radiators but they seem to have no air in them, any help gratefully accepted as I am only used to combi boilers which we had in previous properties.

 

[kevplumb]

check the header tank first it may be mt View media item 15390
this may help

 

[minimunchie]

check the header tank first it may be mt View media item 15390
this may help

Just checked tanks all okay did forget to say on original post that there is some warmth in radiators but it is very minimal ,dont know if this helps diagnosis.

 

[kevplumb]

microbore is carp anyway

it sounds like poor circulation (suprise )

also sounds like the system is full of carp (suprise suprise)

try turning the pump speed up for a start

 

[minimunchie]

microbore is carp anyway

it sounds like poor circulation (suprise )

also sounds like the system is full of carp (suprise suprise)

try turning the pump speed up for a start

I have now flushed ,refilled and bled complete system and still have the same fault HELP!!!