Rayburn 400kpf

1 Jan 2017
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United Kingdom
Hi all,
We recently moved house that has a rayburn 400kpf. There's a couple of issues I'd like to try and resolve. Firstly when turning the Rayburn on from cold, it runs for 2-3mins then cuts off as tho upto temp. Move the temp dial down then up it starts again. But only for a minute before it cuts off again. We have to keep turning the dial up and down to get it up to temperature. I've changed the temp stat but the problem persists. Secondly. Should the powerflu outside continuously run while the mains are turned on. It never stops on 24/7. Is this correct?

Hope someone can help!

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These are unnecessarily complicated to fault find on. You need an experienced service engineer, and if parts are required, deep pockets. The flue fan should not be on all the time, but may run when the cooker is not on to dissipate residual heat.
Hi, did you find out what was wrong, we had the same model firtted in November and it's doing exactly the same thing.

We are struggling to get the installers to rectify the problem! We are trying now to go direct to Rayburn.
Hi, no the problems are still there. If any1 knows anything let us know!
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If it uses the aga rayburn electronic circuit board, this will contain an airflow sensor that extends from the board into the power flue. When the burner starts up the circuit board tests for correct air flow and if it doesnt see it, it shuts the burner back down for safety reasons. This part of the board can corrode and then the burner will only work for a brief period as it waits for the motor to get up to speed. The motor has a run on timer so it will carry on after shut down. Hopefully thats not too misleading and it's the sort of board you have :-/

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