Central heating boiler will not light

[mark4asp]

My central heating boiler will not light.

It is a baxi bermuda 552

I found the online manual and followed the intructions.
I turned the hot water control on. Turned the room thermostat right up to about 40.

At the boiler: I turned the thermostat (aka heating control) by the CH control to 3.5. Pressed down the push button. Pressed the ignition. The ignition needed to be pressed about 12 times before the pilot came on. Then I held down the push button for over a minute and slowly released it. Just before I had completely released the push button the pilot light goes off. It's happened about 5 times now exactly the same way.

What's going on? Is there another control? There is a screw between the push button and the heating control. What is that screw for? Does it control anything?

Please help. I'm utterly destitute and can't afford a gas man.

 

[kevplumb]

thermocouple

part blocked pilot

gas valve

all corgi jobs btw

 

[ArtfulBodger]

Please help. I'm utterly destitute and can't afford a gas man.

Gonna have to. Am I right in thinking this BBU needs a special TC and a universal won't fit?

 

[ollski]

Please help. I'm utterly destitute and can't afford a gas man.

Gonna have to. Am I right in thinking this BBU needs a special TC and a universal won't fit?

No not on a 552....are you thinking of the oxypilot assembly on the newer boilers?

 

[mark4asp]

Thanks for the help folks.

I tried again. I held the push button down for about 3 minutes and the boiler eventually came on. After the boiler stopped the pilot remained on.

I'm guessing that this is a badly positioned thermocouple?

Anyway it works as well as it ever has.

I'll get it serviced after I get a job.