What does FO mean on front of jaguar combi 24 boiler

[Kirst25]

When the pressure has dropped,it's a jaguar combi 24

 

[crunchy]

[FONT=Verdana,Arial,Helvetica]F0 - Fault Flow rate sensor failure.
F0 - Fault Loss of system water.
F0 - Fault Air lock in boiler
F0 - Fault Pump failure.
Could be any of the above refill sysrtem and see if it looses pressure again
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[Kirst25]

How do I refill the system? Ive come on here as my landlord doesn't have the manual and I don't know what in doing

 

[crunchy]

you should have a stainless steel pipe with a little tap on it this will be the filling loop if you turn that you should see the little gauge on the front of the boiler fill it so the gauge reads between 1 1/2 and 2 (the filling loop will be either under the boiler or the pipe work underneath it

 

[Kirst25]

Oh yeh I've done that,it went abit too high 4.0 so haven't used the heating,what is the pressure meant to be at

 

[fixter1]

1.5 bar you need to get some pressure out of the system could do it with rad bleed valve

 

[Kirst25]

What happens if it is used with the pressure at 3.9 4.0 just til I cab get man back to sort it,is it safe?

 

[crunchy]

if it has to much pressure it should dump it thru the overflow valve

 

[Bartdude]

4 bar is WAY too high.

There is a safety valve that should open at 3 bar to protect the system,if yours has reached 4 the safety system could be compromised.

DON'T USE IT UNTIL IT HAS BEEN CHECKED BY A GAS SAFE REGISTERED ENGINEER.

 

[Kirst25]

It won't keep pressure now,dropping to 0.5,what do I do

 

[Gray0689]

Get a plumber out as your not qualified to work on the boiler