glow worm micron 40ff noise

[galaxy_plumbing]

Hi fellas,

just popped to this boiler on my way home. Never heard such a loud noise. Seems to be coming from the gas valve, sounds like when you shooting gun. Boiler does it when ignites. It works fine but noise is unbearable. Did any of you have this before? Im quite convinced its a gas valve (probably solenoid) but dont wanna be wrong and spend money of new valve yet.

Many thanks,

martin (live long and prosper)

 

[bigman]

Had the same thing on an Ultimate the noise is unbelievable that was the gas valve,the solenoid goes crazy chattering when energised.

 

[galaxy_plumbing]

did you replace whole multi control?

 

[diamondgas]

Shotgun or machine-gun?

 

[bigman]

Was working for a company someone else fitted complete valve didn't get any calls about it so I figure it cured it

 

[galaxy_plumbing]

Shotgun or machine-gun?

more likely machine gun

Was working for a company someone else fitted complete valve didn't get any calls about it so I figure it cured it

many thanks.

 

[diamondgas]

Chattering Valve is either due to intermittent power supply or knackered solenoid! If you put your multimeter across the valve terminals whilst it's chattering you'll be able to tell which! A constant supply will indicate valve, fluctuating would need further investigation IMHO! Just changed a honeywell grey button solenoid the other day for 'chattering'... test gave a constant 240v across the L&N ...

 

[arran197]

I had this on an Ideal Classic. It was the pcb. You need to check the voltage going to the gas valve is consistent. If it isn't, it's the pcb. If it is, possibly the gas valve.

 

[GrahamM]

I had this on an Ideal Classic. It was the pcb. You need to check the voltage going to the gas valve is consistent. If it isn't, it's the pcb. If it is, possibly the gas valve.

Had it as well on an old Sime Super or something. Thought was gas valve/solenoid and turned out was PCB.

 

[diamondgas]

Tis why you're better off testing the power to the solenoid. You'll see the power jumping about if it's upstream of the valve. Dirty contacts on stats and relays can interrupt the supply and bring about the 'chatter'. This will only occur upstream on older appliances post pre-mix burners I'd imagine.

 

[galaxy_plumbing]

fixed, seems like new valve treated the problem.