Stanley. Monoflame, Mains tripping

[andytw]

Hi,

Just looking for any wisdom out there before I start.
100k twin burner Stanley fitted with Monoflame burners, Danfoss pump etc.
I put the heating on the other night, ran for maybe 45 minutes, then it tripped the house earth leakage trip.
I reset it and 10 minutes later the Stanley went through it's start up motions again, and out went the trip again.
I turned it all off

The rest of the system would be on, pump, valves etc but I think that fact the Stanley was about to start is significant.
Just wondering if anyone has been there, done that etc.

Thanks

Andy

 

[andytw]

Solenoid for sure. Not tripping with it unplugged, just going to lockout.
Boiler now running with solenoid coil off the cooker burner.

A