Pilot light out and not re-igniting

[skinnyjohn]

The pilot light on my Biasi 24S has gone out. The re-ignition light has come on, but when I press it it doesn't do the job.

I can see the spark flickering trying to light the gas, but nothing is catching alight. I have gas coming through the cooker hob, so don't think there is a problem with the mains supply.

The water pressure has dropped right off - is this connected to the pilot light going out? I have re-pressurized up to about 2.5 bar but still no joy.

The boiler is only 4 years old and has never played up before. Any thoughts on what this might be - is it boiler engineer time?

 

[weargas]

The pilot light on my Biasi 24S has gone out

you don't have a pilot light on that boiler.

I can see the spark flickering trying to light the gas, but nothing is catching alight.

that would indicate a faulty gas valve as the ignition control box energises the gas valve at the same time as spark generator. best to have a heating engineer check the valve to be certain or if you have a multimeter and some electrical knowledge i'll explain to you how to test. you'd still need a heating engineer to change the valve as it would involve the setting of gas pressures

The water pressure has dropped right off - is this connected to the pilot light going out?

that boiler doesn't have a pressure switch it has a flow switch so the pressure could actually read zero and the boiler would still fire if there was enough water in the system to operate the flow switch.

I have re-pressurized up to about 2.5 bar but still no joy.

too high! bleed a radiator into a dish or bucket until the pressure reads 1bar. if you fire the boiler up with the pressure that high you're gonna cause yourself a new problem.

 

[skinnyjohn]

The pilot light on my Biasi 24S has gone out

you don't have a pilot light on that boiler.

I used to be able to see a small flame through the window in the front of the boiler, which I thought was the pilot light. My mistake, thanks.

I can see the spark flickering trying to light the gas, but nothing is catching alight.

that would indicate a faulty gas valve as the ignition control box energises the gas valve at the same time as spark generator. best to have a heating engineer check the valve to be certain or if you have a multimeter and some electrical knowledge i'll explain to you how to test. you'd still need a heating engineer to change the valve as it would involve the setting of gas pressures

The water pressure has dropped right off - is this connected to the pilot light going out?

that boiler doesn't have a pressure switch it has a flow switch so the pressure could actually read zero and the boiler would still fire if there was enough water in the system to operate the flow switch.

I have re-pressurized up to about 2.5 bar but still no joy.

too high! bleed a radiator into a dish or bucket until the pressure reads 1bar. if you fire the boiler up with the pressure that high you're gonna cause yourself a new problem.

The pressure has since dropped back down to 1bar, so it seems to have righted itself. Sounds like I had better call an engineer. Many thanks.