Misting windscreen

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bitonthesidexm
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Misting windscreen

Post by bitonthesidexm » Fri Feb 11, 2011 8:15 pm

Someone give me a clue before I give it a good kicking - how do I stop the windscreen misting up? I have cleaned it about 3 times and then bought some wipes from Halfrauds and it still mists up! I drove it earlier on and it wouldn't clear. The fan seems slow as well. Any ideas?
1994 XM Turbo Onyx in black.

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Dean
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Re: Misting windscreen

Post by Dean » Fri Feb 11, 2011 8:47 pm

sounds to me like the heater matrix is leaking and water vapour is being blown out and condensing on the screen, either that or the re-circ flap is stuck.
Are you using any coolant?
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robert_e_smart
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Re: Misting windscreen

Post by robert_e_smart » Fri Feb 11, 2011 9:04 pm

Heater matrix, or is the ventilation set to re-circulate? Check for damp carpet and sunroof leaks also.
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Peter.N.
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Re: Misting windscreen

Post by Peter.N. » Fri Feb 11, 2011 11:24 pm

Seconded .. or would that be thirded.
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Dieselman
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Re: Misting windscreen

Post by Dieselman » Sat Feb 12, 2011 10:40 am

Also check the air intake in the front scuttle isn't full of wet leaves and the water diverter tray is complete and working.
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boyse7en
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Re: Misting windscreen

Post by boyse7en » Sat Feb 12, 2011 3:01 pm

Also check the air intake in the front scuttle isn't full of wet leaves and the water diverter tray is complete and working.
I second that. Rod the drain tube in teh front scuttle (I use an old plastic strip from a windscreen wiper to do mine) in case it has got clogged.
I thought my heater matrix was leaking, but found that the tube was blocked with pine needles preventing water from draining away properly. result was wet carpets.

Wasn't there a trick to dry out cars before dehum units were invented, putting a bowl of cement powder (or was is quicklime?) in teh car, closing all the doors and leaving it for a while. The powder would absorb the water vapour.
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2point5XCL
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Re: Misting windscreen

Post by 2point5XCL » Sat Feb 12, 2011 8:57 pm

Silica gel is a commonly used desiccant and can be reconstituted for re-use by heating for a couple of hours at 120C.
Other materials such as cement will absorb water vapour very slowly, react chemically and harden.

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Dieselman
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Re: Misting windscreen

Post by Dieselman » Sat Feb 12, 2011 11:00 pm

Newspaper is excellent for absorbing water out of carpets.
91 3.0 sei M. 4852 EXY Black
92 2.1 sed M. 5740 ECZ Sable Phenicien
92 3.0 V6-24. 5713 EXY Black
92 2.1 sd M. 5685 ENT Blue Sideral
Prev
90 2.1sd M. 5049 EJV Mandarin
92 2.1sd A. 5698 EJV Mandarin
94 2.1sd A. 6218 ERT Triton
91 2.0si M. 5187 EWT White

bitonthesidexm
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Re: Misting windscreen

Post by bitonthesidexm » Mon Feb 14, 2011 8:05 pm

Dieselman wrote:Also check the air intake in the front scuttle isn't full of wet leaves and the water diverter tray is complete and working.
That sounds worth a try as it has leaves everywhere! I take it the front scuttle is the piece under the front windscreen!?
1994 XM Turbo Onyx in black.

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