help with glowworm ultimate 40ff

[benthomas]

Hi guys, first-time poster here!!!!

I have a problem with system listed above. The boiler was working fine until very recently when the central heating stopped working, although the hot water worked fine. I searched various places on here and self-diagnosed the problem as the mid-position valve. I have purchased a new one and replaced this myself. Since changing this, the system came on with demand from both central heating and hot water but only for a couple of minutes. It went off and I could not get it back on. I was checking everything through when all of a sudden the boiler came on and fired for 30 secs (ish) and then went off again. I have no LED lights on the PCB at all.

Anybody got any ideas, please?? Any help/suggestions would be grateful.

Cheers. ben

 

[kevplumb]

when you changed the valve was it locked on man when you refilled the system

any air vents near the cylinder

 

[PEDANTICVINDICTIVEMAN]

I got a brill idea, get someone in who knows what they are doing

 

[seco services]

when you had either hw or heating on and the boiler didn't fire
check the orange terminal in the wiring centre is still live.
if this is still live then the faults more likely the boiler end.
sounds like a loose connection somewhere.

you say only fired for a short period ie as in electrical fault or airlock etc as kev has said ?

 

[benthomas]

kev - when i select either hw or ch then the mid-position valve reacts in the required manner.
pedanticvindictiveman - damn fine idea.....only if they didn't charge so much I would!!!

seco - I have 240V on the orange when demand is called for.

 

[kevplumb]

kev - when i select either hw or ch then the mid-position valve reacts in the required manner.

yup but the boiler/pump might well be full of air

 

[seco services]

looking at your post again sounds like the systems airlocked like kev said.
did you bleed the pump ?

s*d beat me again.

 

[benthomas]

what's the best procedure for bleeding the system then guys??

 

[kevplumb]

View media item 11360
any vents

lock the valve in "man"

View media item 17592
undo the bleed screw (have a cloth handy)

im gonna do this post in word

must be the time of year

 

[benthomas]

cheers for that kev. I have bled both points until water runs continuously but still have nothing.

Where would you go next?? Apart from the pub which is where I feel like going...

 

[kevplumb]

did you check that the pump was actually running when you removed the screw

 

[benthomas]

did you check that the pump was actually running when you removed the screw

doh!!! no the pump wasn't running. but i can't get it to run either. is there a way i can do this.

 

[kevplumb]

big screw out get a narrow screwdriver and insert it then give it a spin you will feel the groove on the shaft

oh btw

plank

 

[benthomas]

the boiler just kicked back in (for any unkown reason...)
so i sprinted up the stairs and undid the screw on the pump, got loads of air out and from the vent as well and the boiler is still running...

thanks very much for all your help. very much appreciated. will definitely make this my first port of call in future. CHEERS!!!!

 

[kevplumb]

ahh another satisfied punter

ive either got a warm feeling or just peed myself