Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: farmer andy on 14 November 2014, 16:50:21
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Hi. I am new to here and have a problem with my 2001 omega 2.5dti. I have had it for 2 year now, and when the winter comes along, the screen mists up completely so I am unable to see. At. first I thought it might be the heater matrix, but then it would do it all the time. Then I read it could be the pollen filter that needed changing, changed it and no difference. Then I checked to see if there was a water ingress, cant find one. I love the car and don't want to get rid of it, but it is near on impossible to drive in wet or cold weather.
I was hoping someone might know what is causing it.
thanks in advance
Andy
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Does the aircon work, and if so, do you use it?
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Do you have air con / climate control ?? If so, are you actually using it ?? If you are .. is it working properly (sufficient gas)??
Part of the air con function is to dry the air as it warms it; this time of year warm air with moisture in it hits cold screen and mist will form .. if the air con is working the warm air is dry so no moisture to cause the mist.
Air con / climate working properly will solve the problem for you.
Another cause is wet/damp carpets caused by a blocked/overflowing scuttle drain .....
bugger .. beaten to it ...
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Sorry Nige ;D your post was far more eloquent though... :y
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Make sure the vent in the off side boot cubby hole is clear also
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You mention that you have changed the pollen filter.....did you use a genuine one or a cheap after market one..also as mentioned make sure that the air vent in the boot is not covered up...thats the right hand side as you look into the boot where the cloth panel opens up...look down into the base and you will see the plastic grille,,as some people stuff bits it there not knowing there is an air vent in there that needs to be free to let the air pass through. :y :y
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thanks to everyone for their advice. I will look into all these tomorrow. The air con is working although not as efficient as it should be, but at the moment I am running it on economy to see if it makes a difference, which at present it doesnt
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thanks to everyone for their advice. I will look into all these tomorrow. The air con is working although not as efficient as it should be, but at the moment I am running it on economy to see if it makes a difference, which at present it doesnt
that means the a/c is OFF ;)
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Another cause is the recirculation flap getting confused.
Mine used to do it occasionally, pressing the recirc button (to drive it closed) then again after a pause (to drive it open) would clear the screen again.
It hasn't done it since I fitted a replacement alternator (which ties in with a bulletin citing low voltage being the cause).
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thanks to everyone for their advice. I will look into all these tomorrow. The air con is working although not as efficient as it should be, but at the moment I am running it on economy to see if it makes a difference, which at present it doesnt
Check the fill valves and condenser for obvious leaks, rectify as required and get it regassed :y
There's a system pressure discrepancy between it being too low to work properly, but not low enough to shut the compressor off. Regassing it anyway might be enough to get it back upto scratch until the spring :-\
Bit chilly for stripping the condenser out, although from your name, you might be used to British winters ;D
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Post #11
http://oldsite.omegaowners.com//forum/YaBB.pl?num=1264091854
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I had exactly the same problem, thermostat was staying open, changed thermo and this year screen clears after short while
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Meant to say my air/con is not working ,i just leave it on ECO
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Meant to say my air/con is not working ,i just leave it on ECO
If your Aircon isn't working, then it's a bit pointless pressing the ECO button, as it's in ECO mode anyway! ;D
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Only trying to help!
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Only trying to help!
Sorry, didn't mean to offend. Just thought you should know that when the A/C compressor isn't functioning, it is in ECO mode. :y
If you are just short on gas, get it sorted. The A/C should be run for a minimum of an hour a month, although I thranslate that to an hour a week.
If your system is knackered (faulty compressor/condenser) then don't worry about it (if you don't want it fixed, that is);.
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As an aside, are you sure its a 2.5DTI, as Vauxhall never released such a car (only Opel). If its a Vauxhall, but pre approx 2001, it will be a 2.5TD, and if a Vauxhall post approx. 2001, it will be a 2.2DTI. There are pretty major differences between these various engine types ;)
Back to your issue, misting up is obviously caused by moisture in the cabin - hardly surprising this time of year, added to the fact that the Omega doesn't have the best ventilation in the world.
Reasons it can happen are anything from getting in with wet coats etc, A/C suddenly stop working or water entering the cabin.
Some pointers to check:
Is the AC working (AC acts as a dehumidifyer, but when turned off, and lot of the recent condensate re enters the cabin)?
Is the passenger footwell carpet wet - if so check scuttle drain is clear.
Is the pollen filter wet or missing (damp ones can be dried out).
Is the correct pollen filter fitted if a facelift car (non carbonised ones on facelifts can cause recirc function to come on automatically)
Is recirc on
Is the outside temp, according to temp gauge dipping below 4C (thus AC system shuts down)
Check the ventilation exhaust vents (OS rear cubby hole in boot) are clear, and not stuffed with rags/blankets/shite, as this stops/reduces airflow entering the car, as it can't effectively exhaust.
Leaks around sunroof (rare on Omega) or split doorseals (rare on Omega)
If its just a load of wet people got in together, and its too cold for the AC to work (4C), just doing a few miles with the rear windows open by about an inch, and heaters on pointing to floor (and windscreen if required), can do wonders to help remove the excess moisture quickly... ...and if that works, revisit the exhaust vents for restrictions ;)
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This time of year I do find General de misting first thing to be a nuisance. Cold air from de mist function doesn't work, until some heat gets into the cooling system and all is well. Usually just as the lpg flicks over, which makes sense.
I don't hink there is anything wrong as such, it's just slow to warm up.
...although obviously the op has further issues. Get that ac sorted, only then will the climate control function as designed. It WILL steam up with ac off (Eco on) this time of year, regardless.