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Jun 14th, 2026
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Joined: Sep 2016
Posts: 1,035 Likes: 36
Has a lot to Say!
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Has a lot to Say!
Joined: Sep 2016
Posts: 1,035 Likes: 36 |
One of the gauges on my car has just started misting up for the first time.
I've owned the car for fifteen years !
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Joined: Jun 2014
Posts: 11,616 Likes: 43
Wave & smile... It's a Morgan Member of the Inner Circle
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Wave & smile... It's a Morgan Member of the Inner Circle
Joined: Jun 2014
Posts: 11,616 Likes: 43 |
One of the gauges on my car has just started misting up for the first time.
I've owned the car for fifteen years ! Everything eventually mists up when old ! 
2008 XXVII Platform, Bugatti Blue Roadster 4 Seater
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Joined: Apr 2012
Posts: 5,013 Likes: 32
Charter Member
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Charter Member
Joined: Apr 2012
Posts: 5,013 Likes: 32 |
Weird...we have virtually identical cars and none of the dials ever mist up.....
Is it because the garage, and thus the car, is part of the house and the temperature never falls below 10C?
I've no idea!
It could be - but I have a dehumidifier running out in my barn... the barn is oak and not damp... it retains a little heat even in hard frosts. Mine will typically mist when the sun is behind me and hits the dash. Did your Roadster's dials mist?
+8 4.8
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Joined: Sep 2011
Posts: 14,748 Likes: 158
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Member of the Inner Circle
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I've now got all LEDs. I'll have to wait for some cold weather to see if it has resolved the problem 
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Joined: Jul 2007
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Member of the Inner Circle
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Peter, LEDs didn't work for me. The instruments themselves produce enough heat to cause the issue.
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Mar 2017
Posts: 1,615 Likes: 1
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Mar 2017
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I notice that with the heater on, it gets really warm under the dash. Perhaps the air within the instruments expands and then cooler moist air is drawn in when they when they cool.
The glass is colder, so gets condensation.
So, maybe blank off the underside of the dashboard from the heat and then duct cold air in from a duct mounted just behind the drivers right ear. Wouldn't need a fan.
Please could someone try this and let us know the result?
Last edited by Stuart Green; 01/11/17 10:00 PM.
SFG
2012 4/4 Sport
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Member of the Inner Circle
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The new small instruments that I have, replacing the 3 in 1 instrument, are all digital and lit by LEDS. I have gone to somewhat extraordinary effort to find and replace the incandescent bulbs in the speedo and tacho and the clock which remained incandescent. The main problem was finding LEDs that had a reasonably similar colour temperature to the LEDs in the digital sealed instruments.
Peter
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Joined: Dec 2008
Posts: 22,358 Likes: 353
Roadster Guru Member of the Inner Circle
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OP
Roadster Guru Member of the Inner Circle
Joined: Dec 2008
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A brief update.
My (2005) gauges are still OK, but when running the engine in the garage one day, the oil pressure gauge misted up!
Apparently there have been mixed messages from the manufacturer (of the gauges) with an implication that the gauges are sealed units. My Roadster gauges are certainly not sealed, having vents top and bottom. I haven't yet investigated the Plus 4 gauges.
Some newer Trad cars with the three large gauges are also apparently suffering with bad misting up, which is a problematic issue if the factory consider it to be normal!
DaveW
'05 Red Roadster S1
'16 Yellow (Not the only) Narrow AR GDI Plus 4
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Joined: Jan 2016
Posts: 625
Talk Morgan Regular
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Talk Morgan Regular
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My gauges only ever mist up on hot days with the sun on them - go figure 😄
Cheers John
2011 4/4 - "Elrond"
2007 Elfin C3 Clubman - “Gimli”
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Joined: Sep 2011
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Member of the Inner Circle
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Posts: 14,748 Likes: 158 |
Quite cold this morning but the air is very dry so it they may not have misted anyway. I took the car for a short run of only about 5 km (each way) to post a letter  No misting with the LEDs, but, as I said, it may not be a fair test.
Last edited by Gambalunga; 01/12/17 03:43 PM.
Peter
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