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Immersion has just one element goin in at the top...The ciruit board feed that keeps tripping is marked MCB B16 61/B16. There are 2 switches in the airing cupboard one is marked 'off-peak'.... the booster is Pactrol WHB2 Thanks

I have a problem and would much appreciate any help. I have an immersion heater which is heated overnight on Economy7 tarriff and has a separate control box for a 2hr boost when needed outside theses times. I foolishly turned the boost switch on whilst it was being heated by Economy7 and it...