Technical Grande Punto Aircon Drain

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Technical Grande Punto Aircon Drain

Paul TJ

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Hi I have an 08 "Dynamic M JET 16v diesel" Punto. The air con is not draining so it mists up unless the air con is permanently on. Can someone advise where the aircon is and how I get to it?! Any advice? Thanks in advance.
 
Hi Paul,


this one is quite common on GP's. I'm not convinced however that it is down to the aircon drain pipe alone.


Aircon on systems have a "dryer" which is a catch tank of sorts that is supposed to catch and collect water from the aircon system. These can fill up over time and do occasionally contribute towards the issue you mention. That's one.


Two, I have the same issue with mine, I was told that if my windows were spotless inside (clean of any grease/dirt deposit) then condensation would not occur. Well, I can vouch that after spending significant amount of time at the beginning of each winter to clean the windows there is some truth to that. Basically, no matter what you clean windows with it will always leave a micron thick film on the glass, the ticker the film the more condensation/bigger droplets, the finer the film the smaller the droplets. After using all methods under the sun, I find the best way to clean is when the window is misty, the wiping the water with a clean industrial paper roll absorbs the water and leaves fine streaks of dirt on the paper. The trick is to always use clean paper to wipe with, so after one or two wipes, the paper should be rotated. Granted it uses allot of paper, but once you have been through this procedure once or twice, you will notice that the windows mist will be finer and finer and clear up much quicker. Smokers, good luck with the (ask me how I know). That's two.


The other thing is that Aircon is a dehumidifier when working properly, so it does dry out the air inside. When using the aircon I find that switching it off (the aircon not the fan) a few miles or a few minutes before you park up helps towards not having the aircon system release the captured moisture back into the cabin. That's three.


Happy to listen to others opinions and views on this as it is a common complaint if you look around, but that's how I handle mine (dryer yet to be replaced on my 07 GP Multijet).


Humour
 
The drain is on the bulk head on the passenger side. It's a little black plastic tube that bends downwards and the end is covered by a rubber cover designed to not let water back up into the cab...

This time of year the air is cold and damp. You put the aircon on and it clears the screen and drys the air through the heater system.

Turn it off and the moisture that is collected in the evaporator is then picked up by the warm air coming through the vents and gets deposited on on the cold glass of the windscreen. Just keep the hot air on and it will clear again.

This is perfectly normal operation of the system in the current climate.
 
Hi Paul,



Aircon on systems have a "dryer" which is a catch tank of sorts that is supposed to catch and collect water from the aircon system. These can fill up over time and do occasionally contribute towards the issue you mention. That's one.


They do have a "dryer" it removes moisture and other contaminants from the gas in the sealed system and has nothing to do with the air or moisture in the cabin of the vehicle
 
They do have a "dryer" it removes moisture and other contaminants from the gas in the sealed system and has nothing to do with the air or moisture in the cabin of the vehicle


Which does have an effect on the efficiency of the system and its operation, no? Granted that the sealed/gas part of the system which is where the dryer resides has no direct impact in-cabin regarding moisture.


Hum
 
Which does have an effect on the efficiency of the system and its operation, no?


The correct name is 'receiver' and it is basically the reservoir for the system storing gas and oil, a filter to catch any debris and with a small amount of desiccant to absorb any moisture left over from manufacturing. It's essential to a car air conditioning system to work properly and effectively.

It's not so much about "improving efficiency" as being essential to the system working.... Like the compressor or the expansion valve
 
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