Glow worm 30ci won't stay alight

[finchy01]

Afternoon chaps, I'm at a lose.

I have just come away from a job wlempty pockets as couldn't fix the problem.

Scenario.
Glow worm 30ci combi won't fire. It sparks, fires on low flame but goes out after 5-10 seconds and then goes to F1. With all cases off right back to burner, it stays on. So obviously an air flow problem. Flue is clear, between fan and burner clear, seals all look ok. The fan was at 20 ohms so I thought it may just be on its way out so I have changed that (manufacturer agreed when I called tech) but this has made no difference. Any ideas? Thanks

 

[Harvest Fields]

Have you got a GC number?

 

[Aire]

Could it be a fault with the air pressure switch?

Other than that the manual says to check this.

 

[Last Plumber]

Afternoon chaps, I'm at a lose.

I have just come away from a job wlempty pockets as couldn't fix the problem.

Scenario.
Glow worm 30ci combi won't fire. It sparks, fires on low flame but goes out after 5-10 seconds and then goes to F1. With all cases off right back to burner, it stays on. So obviously an air flow problem. Flue is clear, between fan and burner clear, seals all look ok. The fan was at 20 ohms so I thought it may just be on its way out so I have changed that (manufacturer agreed when I called tech) but this has made no difference. Any ideas? Thanks

Make sure that the minimum burner pressure is correct. If it isn't, you won't get contact across the flame and it will go out as you described.

 

[finchy01]

Have you got a GC number?

47-047-20

 

[finchy01]

Thanks chaps. I will try and go back and check that. The PCB was replaced last year (I know that doesn't mean it won't go again) so I didn't think it could be that.

 

[finchy01]

Only trouble is there is a pipe (think it was the filing loop but didn't check) blocking the gas valve making it hard to get to the test point on the valve.

 

[Harvest Fields]

Aren’t they a zero governor on the CI?

 

[Harvest Fields]

47-047-20

I personally would be checking that there is continuity on all electrodes and leads and that the fan is running correctly.

 

[finchy01]

I personally would be checking that there is continuity on all electrodes and leads and that the fan is running correctly.

But it lights and stays alight with so cases off. My thoughts were partially blocked gas run so not enough gas is getting through to the burner so it's pulling it out too quickly to ignite, I can't see the flames lifting though when the case is on, they just slowly go out

 

[Harvest Fields]

But it lights and stays alight with so cases off. My thoughts were partially blocked gas run so not enough gas is getting through to the burner so it's pulling it out too quickly to ignite, I can't see the flames lifting though when the case is on, they just slowly go out

Then I’d be looking at the fan. What voltage do you have. Does it run on max?

 

[finchy01]

Then I’d be looking at the fan. What voltage do you have. Does it run on max?

I changed the fan add that's what I thought but made no difference, so if anyone needs s brand new fan still in box!!!!

 

[Harvest Fields]

I changed the fan add that's what I thought but made no difference, so if anyone needs s brand new fan still in box!!!!

It sounds like an air circulation issue. APS/ Flue/seals

 

[erion]

Check condense trap possibly blocked

 

[EvilDrPorkChop]

Flue restrictor problem?