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Heated windshield washer nozzlesViews : 4000 Replies : 16Users Viewing This Thread : |
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May 11th, 2021, 08:52 | #1 |
Volvo family member
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Heated windshield washer nozzles
Hello,
Probably sounds silly but could someone give me more light on that? Volvo web is saying: The washer nozzles are heated automatically in cold weather to prevent the washer fluid from freezing. I get that but what if my windscreen is completely frosted? Will it help with defrost? Cold weather what they mean by that. UK 0 centigrade? |
May 11th, 2021, 09:14 | #2 | ||
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Quote:
Quote:
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May 11th, 2021, 09:15 | #3 |
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Not usually.
You really should defrost the screen before attempting to use the wiper blades otherwise the blades might still be frozen to the glass and might damage them. The heated washer jets are only there in an attempt to prevent the washer fluid from freezing inside the nozzle and leaving you unable to use them until they're thawed out. Think of it this way. Before you leave on your trip, you defrost your windscreen (not using the wipers). Then, while you're on your trip, your screen is smeared with crud from the gritted road kicked up by the cars ahead and you need to clear your screen. This is where the heated washer jets come in. This has invariably failed on most cars I've owned that have boasted heated washer jets - in cold weather I'm invariably dry-smearing crud on my windscreen. But no, they're not intended as a way of defrosting your screen before you leave.
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May 11th, 2021, 09:19 | #4 |
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It is not for defrosting your windscreen, during winter with lots of salt and grime on the roads you need to use your washers more to maintain good vision, the heated nozzles stop the washer water freezing in the nozzles allowing you to clean your screen.
Heated screens and defrost boost on climate control system and remote start to preheat and defrost are your tools to clear your screen.
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May 11th, 2021, 10:46 | #5 |
Volvo family member
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This to you guys!! now i have clear view about this feature. I do not have heated windscreen as I prefer HUD.
I am curious why heated windscreen and HUD cant go together? |
May 11th, 2021, 11:52 | #6 | |
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Quote:
Regarding the heated screen and HUD... the fine wires in the screen affect the reflections ...
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May 11th, 2021, 12:18 | #7 |
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I believe there's a coating or film on the inside of the windscreen that aids the reflection (so you don't get ghosting effects of both surfaces of the glass). It's this reflection aid that doesn't like heated glass.
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May 11th, 2021, 21:18 | #8 |
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Laminated glass worker here with a quick guide. The heated screen has a conductive paint printed on the surface of the glass which is then tempered to harden there is then an interlayer placed on the glass a second tempered glass is placed onto this the two are then autoclaved under vacuum resulting in a glass sandwich I believe the printing is on the inner pane but not 100%. The Hud glass is made the same way but with a different interlayer that enables an image to be seen. If you had the zig zags of conductive paint present there would be a resulting distortion in the hud.
I think that's how it works from the glass I have seen. I don't think the glass itself is coated because of damage over the years through people cleaning etc. |
May 12th, 2021, 16:41 | #9 |
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Heated washer jets are useless if you don't have the correct strength washer fluid in the system, yes the jets may heat up but the water in the pipes leading to them freezes anyway if it is below strength.
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May 12th, 2021, 23:22 | #10 |
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of course , its so that the slightly warm water from the jets melt the ice off the windscreen, in theory , not sure its that good in practice !
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