I'm hoping someone can help as I'm at the end of my tether! Our Bathroom extractor fan recently starting making an unhealthy noise and then stopped working altogether. I thought it would be a relatively simple task to replace like for like, so I bought a brand new identical model (Manrose xft100t) and simply swapped them over.
Unfortunately this has not worked, there seems to be a problem with the switched live. I have re-wired the light switch and isolator switch in case it was a loose connection but no success, I found that occasionally if I jiggled the 2 switched live wires that are connected to each other in the light switch they would spark and the fan would kick in when I turned the light off. This was purely an accidental discovery as I was using an electrical screwdriver to check if the wires were live.
Has anybody got any clue? The only thing I can assume at this point is a fault with the wiring itself, but I don't understand why this would just fail?
Firstly, when you say electric screwdriver. I assume you mean a screwdriver in the disguise of test instrument? BIN IT! They are potentially dangerous, as they can give you bogus/unreliable readings.
You really need a two pole test instrument, a simple multi-meter can offer much better and more reliable results.
By the evidence you have given, it sounds like you have a broken/damaged conductor. This will need to be stripped back until you have end to end continuity of the conductor. Or possibly a fault terminal or contact where these cables are terminated. But without testing would be difficult identify the issue!
Thanks very much for the advice, I'll give it a go this weekend and see how I get on. The screwdriver in question was the type with the orange light in it, no good? I do have a multi meter so I'll give it a go.
Just checking, when you say 'conductor' you mean the wire itself right?
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