Help With Baxi Back Boiler - Pilot Not Igniting Reliably

[BinM]

Please can somebody offer some advice as to what the problem could be with my 5 year old Baxi back boiler.

When the boiler is called for approximately 50% of the time the pilot light will not ignite. You can hear the gas valve open and the gas flowing, it sparks away for about 30 seconds and then stops, after 3 cycles the boiler then locks out.

The boiler has been recently serviced and is completely free of dust and dirt in and out. The pipe connected to the ASD is clear (including the small hole half way down). A new ASD/pilot assembly has been fitted and the spark gap is correct.

The circuit board has recently been changed due to a fault which stopped it operating the gas valve.

Any advice would be greatly appreciated.

 

[powell30]

I think you need to call in an RGI.

It could be a number of things but they would need a gas safe engineer to assess

 

[Ronald0]

Did you have the problem before it was serviced?

If you are confident that you have gas flow at the pilot and you can see the spark then gas is not getting within ignition range and is being deflected away. probably by dirt in the pilot jet. Or the spark electrode is not correctly positioned.

 

[Agile]

Like many posters here, you have not mentioned the person who replaced the pilot assembly.

As you engaged him to do the repair then you should expect him to do it properly and cure the problem.

What is his explanation of the problem and why he has been unable to fix it effectively?

Tony

 

[Happyplumber]

I totally agree with Agile on the Back boiler,this requires a registered engineer because these things require certain ventilation and the gas has to be set up correctly.They should not be messed about with by unqualified person

Its not law,but a carbon monoxide alarm should be fitted in the room where the back boiler fire unit is fitted

 

[Boilerman2]

The reason the boiler is reluctant to light "MAY" be attributible to a Flue problem, to get to the boiler entails disconnecting a gas way to the fire so you really MUST get a RGI in for safety's sake!