Isar HE30 -> Sporadic E/F

Joined
27 Dec 2015
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United Kingdom
I've got a hateful HE30, which is probably on it's way out.

I'm now getting an E/F error. The boiler comes on and seems to try and ignite three times (lots of relay clickings, fan up/down). Finally if it doesn't ignite the error code shows.

Occasionally it will ignite and there's a concerning bang as the vessel expands. I imagine this is the gas from the three attempts as the next time it comes on it'll not happen. Hopefully the HE30 has been designed to take this triple gas.

I've also noticed that once warm it'll re-ignite without problem.

Anything obvious to check? I have the manual and am competent but if it's significant I'll call an engineer.

Thanks! Andrew
 

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