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Sold
by simon8201 - 09/09/26 01:46 PM
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Wales
by Joske Vermeule, September 1
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Forums39
Topics49,896
Posts838,013
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Most Online1,063
Jun 14th, 2026
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Joined: Apr 2014
Posts: 3,550 Likes: 5
Talk Morgan Addict
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Talk Morgan Addict
Joined: Apr 2014
Posts: 3,550 Likes: 5 |
How about 12vdc trace heating wrapped around said instruments get it to switch on under 20°C.
Or mini 20mm fans fitted to the cases to circulate the air through?
Desiccant packs inside and sealing the gaps are another simple option.
Mark - No Longer driving Archie the Old English Sheep Mog........... 2010 Roadster 3.0 V6 (S3) 
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Joined: Dec 2008
Posts: 22,371 Likes: 354
Roadster Guru Member of the Inner Circle
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Roadster Guru Member of the Inner Circle
Joined: Dec 2008
Posts: 22,371 Likes: 354 |
I have a plastic film on the four small gauges which will have a small effect on the glass temperature. The big gauges have no film but rarely get any misting. It must be a function of internal volume.
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: Aug 2013
Posts: 15,794 Likes: 15
Formerly known as Aldermog Member of the Inner Circle
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Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 15 |
How about 12vdc trace heating wrapped around said instruments get it to switch on under 20°C.
Or mini 20mm fans fitted to the cases to circulate the air through?
Desiccant packs inside and sealing the gaps are another simple option.
Or heated glass faces for the instruments? Common for marine applications, it is a film that is applied to the glass. Possibly a lot cheaper than MMC's heated glass, too. More, here... Hot Glass One problem, it needs 120v, but inverters are not expensive anymore...
Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...
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Joined: Aug 2011
Posts: 7,553 Likes: 88
Talk Morgan Guru
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Talk Morgan Guru
Joined: Aug 2011
Posts: 7,553 Likes: 88 |
During a quick drive at the weekend - reasonably warm, top down, blue skies - my speedo and rev counter became fogged up... very odd. Never had this happen on any car before.
Fogged up to the extent that from the 10 o'clock to 2 o'clock positions I couldn't see the dials at all.
It cleared of it's own accord once home.
Why might this be? It is quite reassuring to realise that MMC still engineer this feature even into their most recently produced vehicles. Many years ago, when asking about the same issue on my 4/4, I received the "they all do that Sir" answer.
Bud
4/4 "Stanley"
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Joined: Apr 2015
Posts: 237 Likes: 1
L - Learner Plates On
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L - Learner Plates On
Joined: Apr 2015
Posts: 237 Likes: 1 |
During a quick drive at the weekend - reasonably warm, top down, blue skies - my speedo and rev counter became fogged up... very odd. Never had this happen on any car before.
Fogged up to the extent that from the 10 o'clock to 2 o'clock positions I couldn't see the dials at all.
It cleared of it's own accord once home.
Why might this be? It is quite reassuring to realise that MMC still engineer this feature even into their most recently produced vehicles. Many years ago, when asking about the same issue on my 4/4, I received the "they all do that Sir" answer. It still does it on 'new' 4/4's........
Dave
2015 4/4 Royal Ivory
2019 Fiat 500C
2019 Volvo V40 T3R
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Joined: Jan 2009
Posts: 5,945 Likes: 28
Charter Member
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Charter Member
Joined: Jan 2009
Posts: 5,945 Likes: 28 |
The instruments in my boat do the same thing. The answer is to crank up the aircon and take the water vapour out of the instruments. Alternatively fly blind. What do you really need the instruments for any way?
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Joined: Apr 2014
Posts: 3,550 Likes: 5
Talk Morgan Addict
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Talk Morgan Addict
Joined: Apr 2014
Posts: 3,550 Likes: 5 |
I like mine misting up the boss lady can't see how fast I am going then.  
Mark - No Longer driving Archie the Old English Sheep Mog........... 2010 Roadster 3.0 V6 (S3)
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