Halstead Eden boiler flame failure

[Inverness]

hi guys. Went to a breakdown today. Fault code suggested flame failure check gas supply. I cracked open the nut to the gas isolation at the boiler good flow of gas.. the inlet on the gas valve very small amount of gas creeping out. Would I correct in saying new multifunction gas valve required?

 

[oz-plumber]

Not necessarily, most gas valves have a mesh filter built into the inlet of the valve.
It may be worth undoing the closest connection on the inlet side of the valve, or removing the gas valve, to check if the filter is clogged.

 

[Inverness]

I've ordered a new gas valve so I'll replace it. Thanks

 

[ShaunCorbs]

Simple test

Manometer on inlet test point of boiler

Shut boiler ISO for gas off

Turn on call for boiler eg demand

Does the pressure drop on manometer ?

If it doesn't open and boiler is sparking gas valve at fault

If it drops and boiler is sparking not gas valve fault

 

[Darren Jackson]

Check gas supply Low gas pressure, Check gas service cock open, Check gas valve and lead, Check detection electrode/lead No flame signal on ignition, or loss, Check gas supply of signal during operation, Check gas valve and lead attempts, Check PCB gas valve connectors, Check mains earth lead continuity, Check Flue gas temperature sensor. It could be a few things not necessarily the gas valve. Muti-meter will determine what is not working & possibly it's a PCB fault if everything else checks out.

 

[townfanjon]

One of them things , I would run !!

 

[Inverness]

All I did when I attached a u gauge on the inlet the gas slowly travelled up the u guage

 

[Inverness]

Also the boiler is working but it's an intermittent fault.

 

[Harvest Fields]

What condition are the electrodes and flame probe in? If it has one.

 

[Inverness]

I didn't check. When I opened the gas inlet it wasn't flowing out like it normal does. So I thought I figured out the problem.

 

[Harvest Fields]

I didn't check. When I opened the gas inlet it wasn't flowing out like it normal does. So I thought I figured out the problem.

You may have. But just thinking outside the box as you said it was intermittent

 

[Gas74]

Had one of these before with same fault. Changed gas valve, sensors, pcb, ended up being the burner was v intermittent. Burner had no signs of damage but that is what solved it in the end. Nightmare boilers

 

[Inverness]

Process of limitation at the customers wallet!,

 

[Gas74]

Process of limitation at the customers wallet!,

No but this is what it can be like fault finding on intermittent faults.

 

[Inverness]

Strange how the gas inlet point was struggling to pass gas through the screw..

 

[jtsplumbing]

These boilers are known for PCB faults and they are not cheep, same as there Tec help line.

 

[dan_the_plumber]

Wire wool stuck in rubber test tube on your u-gauge?

 

[Inverness]

Electrodes needed cleaned. Now boiler working fine.

 

[Harvest Fields]

What condition are the electrodes and flame probe in? If it has one.

Glad I could help mate