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post #1 of 5 (permalink) Old 2nd January 2007 Thread Starter
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clio headlights - steaming up

Hi, just noticed My passenger side, headlight is steaming up, any tips on how to stop it from steaming up? i had the same problems with my foglight, lol, but when i changed the bulb.. it didnt do it again..
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post #2 of 5 (permalink) Old 2nd January 2007
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It sounds as though there is some moisture somewhere in the headlight unit and when you use your headlight the moisture starts drying out causing an effect similar to the bathroom mirror type thing

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post #3 of 5 (permalink) Old 2nd January 2007
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have a look at the seal around the lights, usualy a plastic cap with a rubber seal around it or just a rubber boot.

It could be, as said before, like a bathroom mirror.. if its cold the heat from the bulb will cause condesation on the inside of the glass.

I think.. its an MOT failure too because the beam pattern is affected.

Im sure someone will correct me on that.


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post #4 of 5 (permalink) Old 2nd January 2007
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What you have is moisture in the headlamp unit, which is normally airborne (and invisible) in warmer weather. 2 ways to tackle this depending on whether moisture is 'trapped' in a sealed unit following a bulb change, or if the sealed has been breached, allowing water in.
Mark I Focuses had this problem, the cause of which was determined by running the light on main beam with the lens covered by black paper and the sidelight bulb removed. This would cause the unit & air within it to heat up, dispelling the moisture, then after around 10 mins with the light on, switch off and carefully replace the sidelight bulb as soon as possible. If unit was sealing properly - moisture will not return, if moisture returns, the lens is not seated properly, and its up to you whether to repair or replace.

The above is a simple enough & cheap test, which will either repair the problem, or point you in the right direction.
I've seen this work on my Scorpio.


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post #5 of 5 (permalink) Old 3rd January 2007 Thread Starter
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thanks will give it a try..

is it really an MOT failure?
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clio , headlights , steaming

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