Rayburn 499k heating not firing

[Mictin]

You say it's both burners that lockout? Chucking parts at a problem in the hope to fix it is not a good idea and can be costly, especially if you're doing it for two burners at once.

I agree, but I'm at a loss as what to try next, any suggestions thanks

 

[Mictin]

I agree, but I'm at a loss as what to try next, any suggestions thanks

The fault sequence is loss of flame signal according to the manual. Steady red for 10 secs 1 short flash 4 long flashes then repeated, so we just press the reset button and it fires up. It's more likely to happen if the back door or a window is open and there is a draught

 

[SJB060685]

Honestly I can't really suggest anything because the problem could be anywhere at the moment. You say sometimes both burners work for hours and other times days, that suggests to me it's not an oil delivery problem to the cooker but doesn't necessarily mean you don't have a problem at the fuel pump. You could also have with the motor or capacitor that drives the fuel pump. It could also be a control box/box mounting plate. It really is hard to say. If you could catch a video of one of the burners losing flame and going to Lockout that would help me narrow it down a little but again it's still hard to say for sure.

 

[Mictin]

Here is a picture of the burners

 

[Mictin]

Yes try that and be careful doing it and when the engineer returns see if he will service the burners.
Once you've broke the grout try removing the panel yourself, undo the screws ad release. If its removable you're laughing.
I really like these appliances, although I personally don't have too much experience with them, I know pressure jet burners and would be more than prepared to take my time getting to the bottom of issues. Unfortunately a lot of engineers don't like them and most who know what they're doing are close to, if not already at retirement age, so if the engineer gets you out of trouble then keep him around.

 

[SJB060685]

Both burners clearly light. You say it locks out on loss of flame signal, is that both burners?

 

[Mictin]

Both burners clearly light. You say it locks out on loss of flame signal, is that both burners?

Yes it's on both burners

 

[Mictin]

Here is a copy of the report from the service. Does it look OK to you

 

[SJB060685]

Ok, if it's the same fault code on both burners that indicates it is fuel related, unlikely to be both photocells, it boxes. I can hear bearings starting to play up, if so on the fuel pump that could be a problem, the pump coupling could be broken and not constantly catching, it could be the pump drive key as well. I'd also check the capacitor as well. When serviced did you notice how thorough they were in cleaning the burner out. It's possible, certainly have seen it many times but not certain the blast tubes are dirty and not reflecting the light to the cells as well. Just another thing to consider.
The report suggests the figures are ok. The boiler side has quite a high O², low CO² and subsequent high excess air, although not what one would usually aim for I'm not convinced it's enough to cause your problem and certainly wouldn't knock both burners out.

 

[Mictin]

Here is a copy of the report from the service. Does it look OK to you

Thanks for your help. I will get the engineer back out to check what you mentioned.

 

[SimonG]

I dont like the printouts. With one burner I would suspect transformer or capacitor. With both then it's probably fuel related.

 

[exedon2]

Just one thing to throw into mix as you mentioned draft being a problem.
I'm fairly certain your cooker has a fan flue? The air pressure switch is know to give problems.

 

[SJB060685]

Just one thing to throw into mix as you mentioned draft being a problem.
I'm fairly certain your cooker has a fan flue? The air pressure switch is know to give problems.

Pressure switch is only on the boiler side if I remember correctly?

 

[Mictin]

Just one thing to throw into mix as you mentioned draft being a problem.
I'm fairly certain your cooker has a fan flue? The air pressure switch is know to give problems.

Thanks for that.