Rayburn 499k intermittent lockout

[Dippy76]

Boiler and cooker will fire up initially however when temperature hit neither will reignite, they go to lockout
You can hear them switch and the solenoids switch but the fan pre purge does not engage, if I continually turn the boiler temperature switch on and off eventually the fan kicks in and everything fires up? I’ve swamped solenoids over, photocells, and control boxes, cleaned the fan blades etc, any ideas?
[automerge]1577463008[/automerge]

Boiler and cooker will fire up initially however when temperature hit neither will reignite, they go to lockout
You can hear them switch and the solenoids switch but the fan pre purge does not engage, if I continually turn the boiler temperature switch on and off eventually the fan kicks in and everything fires up? I’ve swamped solenoids over, photocells, and control boxes, cleaned the fan blades etc, any ideas?

Should also mention this has occurred over the past few weeks before that it was working perfect.

 

[SimonG]

Time to call somebody who knows what they are doing rather than chucking parts and money at it.

 

[SJB060685]

Are both burners not igniting? These cookers have two motors, one for cooker fan and oil pump the other for boiler fan, are both not working?

 

[Dippy76]

Are both burners not igniting? These cookers have two motors, one for cooker fan and oil pump the other for boiler fan, are both not working?

Both are igniting when I initially get them going, they work perfect up to the desired temperature but when they try to engage a while after, you can hear a switch, a buzz then the solenoids switching but no fan, then lockout.
[automerge]1577474321[/automerge]

Both are igniting when I initially get them going, they work perfect up to the desired temperature but when they try to engage a while after, you can hear a switch, a buzz then the solenoids switching but no fan, then lockout.

Also if I turn the boiler or cooker dial setting on and of several times it does fire up and goes on to reach temperature, and the lockout cycle continues...

 

[SJB060685]

Can you send me a picture of burners please.
It sounds like a motor is not rotating

 

[Dippy76]

Can you send me a picture of burners please.
It sounds like a motor is not rotating

I’ve taken another look over all fittings etc and found the capacitor loose and very sticky around the top and the connectors, after trawling various forums I found a post describing almost the same symptoms as mine, that was a failing capacitor. As mine is sticky/leaking and negligible in cost I will replace Monday along with blast tube fire seals (mine have seen better days)

 

[SJB060685]

Yes everything you've said would suggest it's the capacitor. Do you have a multimetre that can read capacitance? While replacing the cap I would check for tight spots on fuel pump and motor at the same time.

Edit: multiple burners have been used for these cookers I believe and my original comment about two motors is not relevant for the ecoflam replacement