Air Conditioning

[ag9111]

Hi,

The higher the temperature differential between what the air temperature is to what you want it to be, the harder the A/C has to work. For example, it is much harder to lower the temperature 18 deg form 40 external to 22 in the cab than it is to lower it 8 degrees from 30 external to 22 inside the cab.

Not true. The system in our utes operate a 100% capacity wether they are being asked to drop the temperature 2 deg or 50deg
Its only the time that the system runs for that changes, till it reaches its set point.

[Brent1]

I have my vents aimed as high as possible and it gets colder in the back than the front. Recirculate on 3 to begin with then drop to 2 once it cools down a bit.

Thanks for the suggestion. I'll definitely do that

[fridgie]

Hi,

The higher the temperature differential between what the air temperature is to what you want it to be, the harder the A/C has to work. For example, it is much harder to lower the temperature 18 deg form 40 external to 22 in the cab than it is to lower it 8 degrees from 30 external to 22 inside the cab.

Not true. The system in our utes operate a 100% capacity wether they are being asked to drop the temperature 2 deg or 50deg
Its only the time that the system runs for that changes, till it reaches its set point.

Technically though, the more heat it has to remove, the longer it has to run, the more bearings etc heat up causing extra drag, thereby causing the compressor to heat up more adding heat into the refrigerant as extra load so you could say that yes, it does have to work harder

[ag9111]

All things being equal Joel God, You guys are hard work sometimes

But it can only run at 100% capacity regardless of extra friction etc

[Brayden's dad]

Hi,

The higher the temperature differential between what the air temperature is to what you want it to be, the harder the A/C has to work. For example, it is much harder to lower the temperature 18 deg form 40 external to 22 in the cab than it is to lower it 8 degrees from 30 external to 22 inside the cab.

Not true. The system in our utes operate a 100% capacity wether they are being asked to drop the temperature 2 deg or 50deg
Its only the time that the system runs for that changes, till it reaches its set point.

Fine....I only do it for a living.

[Kegsy]

But the compressor is either on or off?

Doesn't it run flat chat no matter what the temp is?, the user controls temp via the fan box...

Serious question, not a challenge.

[hvac guy]

Hi,

The higher the temperature differential between what the air temperature is to what you want it to be, the harder the A/C has to work. For example, it is much harder to lower the temperature 18 deg form 40 external to 22 in the cab than it is to lower it 8 degrees from 30 external to 22 inside the cab.

Not true. The system in our utes operate a 100% capacity wether they are being asked to drop the temperature 2 deg or 50deg
Its only the time that the system runs for that changes, till it reaches its set point.

the system may have 100% duty cycle but the capacity of the system changes in relation
head pressure which is heavly dependent on ambient temps and air flow though the condenser.

[KevO78]

Well just an update, i had a mate top up the gas last weekend, wasn't real low and a dealer would say it was within spec. I can defiantly feel a difference in a good way now gets a lot cooler, 5~7oC which on a 44oC day is great

[fridgie]

Hi,

The higher the temperature differential between what the air temperature is to what you want it to be, the harder the A/C has to work. For example, it is much harder to lower the temperature 18 deg form 40 external to 22 in the cab than it is to lower it 8 degrees from 30 external to 22 inside the cab.

Not true. The system in our utes operate a 100% capacity wether they are being asked to drop the temperature 2 deg or 50deg
Its only the time that the system runs for that changes, till it reaches its set point.

the system may have 100% duty cycle but the capacity of the system changes in relation
head pressure which is heavly dependent on ambient temps and air flow though the condenser.

This ^^^^^

[smlr]

An A/C system is as good as its condenser. The better the cooling the better the system will work. You should never top up the gas, actually it's illegal. These compressors are variable displacement compressors & therefore the correct amount of gas should be put in which means removing the gas then put the correct amount in.

[RHKTriton]

For his day and age the ML AC is a bit under average and inconsistent.

My Rocky had a brilliant unit with variable temperature selection, my Commodores were very good as well as numerous other cars.

My Dad's Camira had the best AC I've ever experienced - hit the switch and icey air was coming out in seconds.

My daughter's Alto has a compressor the size of your fist and also blasts out freezing air - red car and not that much difference in cabin volume.

One solution I'm considering is Tinting front windows, better insulate roof and paint roof silver in middle section.

Missing condensor fan must also play a part.

[desblaze]

Well my Aircon decided 4 months out of warrenty that it would stop being cold. I wouldn't mind so much except that I live in Mount Isa and its 35 Deg at 8 in the morning. Been told its the evaporator and you can only get an original part. $1700.00 all up. Not sure if thats a good price. But to keep the Missus happy it MUST BE FIXED! so she said.

[Homer]

Wreckers mate...they all have AC

[Honky]

I have not read all of the threads but have the people whose A/C do not work that well also advised what colour their tritons are?
Mine is white and works a treat even around 40 heat which is nearly every day over the last month.
A bit better than the black commodore I had previously which had a very good air con.
I would also not like the car to be 7 when it is 44 outside as it would make me sick getting in and out.
Irrespective of how high the temperature is, a change of 25 degrees will kill a sheep even in the middle of summer.

Honky

[fridgie]

Wreckers mate...they all have AC

x2

[desblaze]

Mine ML is Black. Has the white strips down the roof and bonnet of faded paint. No wreckers up in Mt Isa either. I have been told by a few people that the silver solder in the joints of the AC pipe work gets eaten out by the Sulhpur in the atmoshpere. If I'm going to replace it, it might as well be new so the issue doesn't happen again.

[Hugebettyswollocks]

The AC in my MN GLXR has been poor since l bought it from new, on the first service l told them this and the tech said he thought it was poor too, so l had to bring it back another day when the AC guy was back from holidays. So l did, it was a cool morning and so I didnt hae the aircon on recirculate or turned all the way down. Picked up the car and was told they used the infra red gun and it was within factory specs. And you know what the cheeky prick said to me?

'the problem is sir that you havnt turned the aircon to its coolest setting and put the recirculation on!' the reponse i gave back has me now barred from returning to the garage

Anyway on a hot day l find that as the temperature out side rises l actually have to turn the temp setting up to stop being blown away when the AC is on auto, which l find strange?!
Its not so bad on the open road, but at a standstill its worse than useless, definately as a result of the missing fan. So lam going to purchase the factory fan and relay and see what difference that makes.

viewtopic.php?f=21&t=12913&hilit=thermo

[fridgie]

Mine ML is Black. Has the white strips down the roof and bonnet of faded paint. No wreckers up in Mt Isa either. I have been told by a few people that the silver solder in the joints of the AC pipe work gets eaten out by the Sulhpur in the atmoshpere. If I'm going to replace it, it might as well be new so the issue doesn't happen again.

Might pay to go through a wreckers and have it shipped up to you, if it is indeed the sulphur eating out the solder (can't say I've ever heard of that before but can't say it doesn't happen either) then buying new just puts you in the same position but a lot more coin down the drain

[Duck]

I spent quite a few years in the Isa & our vehicles spent longer again out there, never had any solder issues from the fallout, the only issue out there was the Irish club it will kill you. I would agree if you can try second hand save the money to put towards the AC fan. Just a thought. Good luck

Mine ML is Black. Has the white strips down the roof and bonnet of faded paint. No wreckers up in Mt Isa either. I have been told by a few people that the silver solder in the joints of the AC pipe work gets eaten out by the Sulhpur in the atmoshpere. If I'm going to replace it, it might as well be new so the issue doesn't happen again.

Might pay to go through a wreckers and have it shipped up to you, if it is indeed the sulphur eating out the solder (can't say I've ever heard of that before but can't say it doesn't happen either) then buying new just puts you in the same position but a lot more coin down the drain

[Homer]

Yes I'd be surprised that the silver solder in the evaporator would be eaten away...it's inside the car and rarely transfers much external air/solvents compared to the condenser outside...

[mad992]

yes well im off to the dealers again on thursday my a-c has gone into limp mode

[mad992]

gidday fellas, well well i need to say a big thank you to mitsubishi for its fantastic 5yr warranty (mine expires 30 december)and to the dealer Nambour Mitsubishi for doing there jobs .While my AC is cool its not cold and ive had a gutfull so i decided to get it sorted before the 5yrs.

my unit had 75grams of gas when they did the vac out.

should have been 550grams spec from factory.

so they ran some tests and found the head pressure not right and the evaporator is getting replaced, with the tx valve and the receiver dryer,new o rings and regassed,i suppose they are covering all bases.all getting done tommorrow because the parts had to come up from brizzy,so all i can say is thank god for the 5 yr warranty.

[Bigbirdalx]

gidday fellas, well well i need to say a big thank you to mitsubishi for its fantastic 5yr warranty (mine expires 30 december)and to the dealer Nambour Mitsubishi for doing there jobs .While my AC is cool its not cold and ive had a gutfull so i decided to get it sorted before the 5yrs.

my unit had 75grams of gas when they did the vac out.

should have been 550grams spec from factory.

so they ran some tests and found the head pressure not right and the evaporator is getting replaced, with the tx valve and the receiver dryer,new o rings and regassed,i suppose they are covering all bases.all getting done tommorrow because the parts had to come up from brizzy,so all i can say is thank god for the 5 yr warranty.

Not sure if its common prac for cars. But ask for a uv dye to be out in. Makes future leaks very easy to locate

[hvac guy]

and change the oil in the compressor

[mad992]

ok so i got a new evaporater

a new tx valve

a new reciever dryer

new "o" rings

and gas

great.