Electrical wiring help

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24 Apr 2012 2:55 PM by garyizme Star rating. 17 posts Send private message

I have a faulty switch for my hot water cylinder. I have changed switches here in the past and in the UK. When I install the new one it blows the main fuse so there is a problem. I have 2 blue and 2 black wires. Any suggestions, could it be a faulty switch?





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24 Apr 2012 3:07 PM by steve and anita Star rating in in San Cayetano. 324 posts Send private message

steve and anita´s avatar

 If it still trips when you have fitted a new switch, it sounds like a problem with the boiler. Try an extension lead in another socket and plug the boiler into it, if it trips then its defo a problem with the boiler.





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24 Apr 2012 3:13 PM by garyizme Star rating. 17 posts Send private message

Hi, boiler is only 2 months old. Strange thing is switch works when on but trips when it is switched off

 





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24 Apr 2012 3:15 PM by steve and anita Star rating in in San Cayetano. 324 posts Send private message

steve and anita´s avatar

 Are you sure you have wired it correctly, as it sounds like a dead short when in the off position.





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24 Apr 2012 3:21 PM by garyizme Star rating. 17 posts Send private message

Hi, sorry but what is a dead short. My knowledge is only DIY. I have put the 2 black wires into one side and 2 blue into the other





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24 Apr 2012 3:23 PM by steve and anita Star rating in in San Cayetano. 324 posts Send private message

steve and anita´s avatar

 Oh, have you tried what I previously suggested, plugging into an extension lead in another socket.





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24 Apr 2012 3:27 PM by garyizme Star rating. 17 posts Send private message

Hi, yes, everything works with that. Strange thing is with the old boiler when we put a timer switch onto it it quite ofter blew the breaker, that is why we bought a new boiler. The switch started to stick yesterday so that could have been the problem all along





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24 Apr 2012 3:31 PM by steve and anita Star rating in in San Cayetano. 324 posts Send private message

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 Try it without the timer, boilers when the initially come on can draw a huge current thus tripping the trip switch, also is it a cheap chinese timer switch???





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24 Apr 2012 3:33 PM by garyizme Star rating. 17 posts Send private message

I no longer use the timer as it is an eco boiler and yes it is a chinese switch so a trip to bricolage for me i think!!





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24 Apr 2012 3:35 PM by steve and anita Star rating in in San Cayetano. 324 posts Send private message

steve and anita´s avatar

 It sounds like your problem then, especially as you say it started to "stick", its probably starting to burn out. Get a decent switch and it should sort it.





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24 Apr 2012 3:36 PM by garyizme Star rating. 17 posts Send private message

Thanks, it's the new one that's chinese. The old one is the original, probably 10 years old now. Many thanks off to buy a real one





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