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    • pennypincher3562
    • By pennypincher3562 2nd Sep 17, 2:41 PM
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    pennypincher3562
    Replacing Halogen Light Transformer
    • #1
    • 2nd Sep 17, 2:41 PM
    Replacing Halogen Light Transformer 2nd Sep 17 at 2:41 PM
    Hi

    A halogen light in my bathroom has gone out, after flickering on and off for an extended period of time.

    I am pretty sure it's not the bulb, and most likely the transformer.

    Is it quite easy for an amateur to replace the transformer, or is that job best left to an electrician?

    Thanks in advance.
Page 1
    • Jonesya
    • By Jonesya 2nd Sep 17, 3:30 PM
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    Jonesya
    • #2
    • 2nd Sep 17, 3:30 PM
    • #2
    • 2nd Sep 17, 3:30 PM
    It's not particularly difficult depending on how it's been installed, but being in the bathroom, it should be a sealed fitting which might make it more tricky.

    Besides given the advances with LEDs you're probably better to replace it with an LED transformer and LED lamp, or fit a new LED bathroom lamp. But make sure any replacement is rated for use in bathrooms.
    • pennypincher3562
    • By pennypincher3562 3rd Sep 17, 11:21 AM
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    pennypincher3562
    • #3
    • 3rd Sep 17, 11:21 AM
    • #3
    • 3rd Sep 17, 11:21 AM
    @Jonesya. I reckon that I can easily pull the whole installation out of the sealing, so will look into replacing the transformer myself.
    • jack_pott
    • By jack_pott 3rd Sep 17, 11:32 AM
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    jack_pott
    • #4
    • 3rd Sep 17, 11:32 AM
    • #4
    • 3rd Sep 17, 11:32 AM
    Ignoring intermittent electrical faults is a fire hazard. Are you sure it's not a loose connection?
    • pennypincher3562
    • By pennypincher3562 3rd Sep 17, 7:12 PM
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    pennypincher3562
    • #5
    • 3rd Sep 17, 7:12 PM
    • #5
    • 3rd Sep 17, 7:12 PM
    Ignoring intermittent electrical faults is a fire hazard. Are you sure it's not a loose connection?
    Originally posted by jack_pott
    Yes, that did cross my mind. I checked the connection to the bulb holder, and it's totally solid.

    I have read that halogens flashing on and off is a sign of a dying or overheated transformer.

    I reckon in my case it is a dying transformer. Why? Because it has been fine for over 1 decade. I could be wrong, but I doubt the wires could start loosening themselves, as nobody has touched them.

    If it was an overheated transformer, then it has a safety mechanism to turn itself off (as far as I know.)

    Thanks for the suggestion though. I've made a note to get this sorted out asap...
    Last edited by pennypincher3562; 03-09-2017 at 7:14 PM.
    • macman
    • By macman 3rd Sep 17, 8:51 PM
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    macman
    • #6
    • 3rd Sep 17, 8:51 PM
    • #6
    • 3rd Sep 17, 8:51 PM
    Swapping the bulb for a known good one will instantly tell you if it's the bulb or transformer. I assume there is more than one fitting.
    No free lunch, and no free laptop
    • pennypincher3562
    • By pennypincher3562 3rd Sep 17, 8:52 PM
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    pennypincher3562
    • #7
    • 3rd Sep 17, 8:52 PM
    • #7
    • 3rd Sep 17, 8:52 PM
    Swapping the bulb for a known good one will instantly tell you if it's the bulb or transformer. I assume there is more than one fitting.
    Originally posted by macman
    Hi

    I've swapped the bulbs and both were flashing on and off. So, whilst I am no expert, I am guessing that it's the transformer.
    • pennypincher3562
    • By pennypincher3562 7th Sep 17, 5:12 PM
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    pennypincher3562
    • #8
    • 7th Sep 17, 5:12 PM
    • #8
    • 7th Sep 17, 5:12 PM
    I've fixed this. It turned out, it was actually the bulb (even though it was the first thing I checked.) Unfortunately my replacement bulbs were old, and apparently on their last legs.

    Anyway, I managed to avoid calling out an electrician, which is good news.

    One thing that does concern me though is the heat coming of these bulbs. I touched one after it had been on for only a couple of minutes, and it was red hot. I don't appear to have any insulation in the ceiling cavity. But I was thinking if there was insulation, surely that heat would cause a fire?!
    • Ebe Scrooge
    • By Ebe Scrooge 7th Sep 17, 6:08 PM
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    Ebe Scrooge
    • #9
    • 7th Sep 17, 6:08 PM
    • #9
    • 7th Sep 17, 6:08 PM

    One thing that does concern me though is the heat coming of these bulbs. I touched one after it had been on for only a couple of minutes, and it was red hot. I don't appear to have any insulation in the ceiling cavity. But I was thinking if there was insulation, surely that heat would cause a fire?!
    Originally posted by pennypincher3562
    I don't think you'll have any worries on that score - "ordinary" loft insulation is made from fibreglass, which would take several hundreds of degrees Centigrade to melt. I'm not even sure if it could ever burn. It's pretty much fire-proof, to all intents and purposes in domestic situations.
    I may not know much about art, but I know what I like.
    • pennypincher3562
    • By pennypincher3562 7th Sep 17, 6:10 PM
    • 2,082 Posts
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    pennypincher3562
    I don't think you'll have any worries on that score - "ordinary" loft insulation is made from fibreglass, which would take several hundreds of degrees Centigrade to melt. I'm not even sure if it could ever burn. It's pretty much fire-proof, to all intents and purposes in domestic situations.
    Originally posted by Ebe Scrooge
    Ok, and I am presuming that halogen bulbs are meant to be 'red hot'? I'm guessing that they are, as they even use halogens in ovens?
    Last edited by pennypincher3562; 07-09-2017 at 8:17 PM.
    • Ebe Scrooge
    • By Ebe Scrooge 7th Sep 17, 6:26 PM
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    Ebe Scrooge
    Ok, and I am presuming that halogen bulbs are meant to be 'red hot'? I'm guessing they are, if they even use halogens in ovens?
    Originally posted by pennypincher3562
    Yup, they do get very hot. That's one of the downsides of them - a lot of the energy that's put into them gets "wasted" as heat. Hence the move towards LEDs, where more of the electricity gets converted to light, and less is wasted as heat. Ultimately it's simple physics - converting energy from one form to another. Ordinary incandescent light bulbs convert electrical energy into a mixture of light and heat energy. So do halogens. LEDs simply do it more efficiently - i.e. converting more of the electrical energy into the form you want ( light ) and less into "unwanted" heat energy.

    As Scotty from Star trek would say, you can't change the laws of physics Energy cannot be created or destroyed, only converted from one form to another. If you can convert most of the input to an output form that you're after, then great
    I may not know much about art, but I know what I like.
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