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Sensor light keeps switching on and off

Discussion in 'Electrics UK' started by eastender3, 15 Aug 2016.

  1. eastender3

    eastender3

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    Hello folks,
    Fitted twin sensor light at the entrance of my shed, one of them keep going on and off after few seconds.

    Any idea what the cause might be.
     
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  3. securespark

    securespark

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    Some fittings have a switchable test mode where it will work in daylight and turn on every time it detects heat/ movement together.

    It is in sight of a flue or TD or extractor/ hood vent output?

    Does it do this 24/7?
     
  4. eastender3

    eastender3

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    No flue or extractor, just in the evening.
     
  5. securespark

    securespark

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    Animals, humans (if near a boundary)?
     
  6. securespark

    securespark

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    Is there a pattern?
     
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  8. Taylortwocities

    Taylortwocities

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    Just in the evening, but not at night?


    EDIT.
    For clarification: when you say
    Is this a light that has a single sensor but two lights in a single fitting. And one of the lights is going on and off, but the other is OK?

    A link to the light would help.
     
  9. eastender3

    eastender3

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    The one the right is ok but the left keep going on and off.
    security light.jpg
    Here is the photo of the offending light, a duplicate is on the other side, which is working correctly.
     
  10. flameport

    flameport

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    Turn the light so it points in a totally different direction well away from the sensor and the wall.

    If that fixes the problem it is due to the light from the fitting entering the sensor which then turns the light off due to too much light - and then it's dark so on again, repeat for ever.
    If it still does it after moving the light, then the sensor is defective.
     
  11. stem

    stem

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    I have experienced this with 3 different fittings on different properties, the common denominator is that they were all installed under a soffit as yours appears to be. One flashed on and off at the same rate as a car direction indicator. It didn't happen when they were moved. I can only guess that light is reflected back from the soffit and fools the light into thinking it's daylight, resulting in what flameport describes above.

    You could always swap the two lights over and see what happens then.
     
  12. DIYnot Local

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