Aircon problem on W204 (C180 1.6)

[Guest rmjunior]

I have noticed that if I did not drive my car for say more than 20 hours, and when I drive and turn on the aircon, only normal air comes out from the vent. It is only after 3 - 5 mins, then the cold air comes in. Is it normal? I have experienced it a couple of times since I collect my ride 2 months back.

[Guest io5885]

Perhaps the air con compressor is warming up??

some bros dont turn on the a/c until the engine gets warmer.

As long got air coming out then it should be fine. :cheer2:

btw, after long hrs of parking, dont u find ur ride roars when u start d engine? :music:

[Guest Tud Tud]

io5885 wrote:

Perhaps the air con compressor is warming up??

some bros dont turn on the a/c until the engine gets warmer.

As long got air coming out then it should be fine. :cheer2:

btw, after long hrs of parking, dont u find ur ride roars when u start d engine? :music:

I didn't notice after long hrs of parking... but i do notice that there a roaring winding down noise just after a shut off the engine.

[Guest io5885]

yup, i noticed dat too.

aint dat musical to the ears? :music:

try parking over 24 hrs. unless my ride is 'sick' if not,

shld be able to hear it 'roars' too... :smile:

[Guest rmjunior]

My ride has that sound too....

At least the cold air comes in late...better than never. Anyway will get it check on my next service.

[Guest Tud Tud]

Is it possible that you guys had the aircon turned on. that roaring seems to be aircon compressor starting up before engine ignition.

i heard it from my dad's w211 but not my w204 cos he doesn't off his aircon at all.

can try to practice turning aircon off before shutting off engine. then when you start off the next day, turn on engine, let it warm up a bit before turning back on the air con. it should reduce the cool air coming in timing and engine noise might as well cover up the air con compressor noise.

check out how aircon work:

http://www.ehow.com/how-does_5014757_air-conditioning-compressor-work.html

the gas within the system should pump faster when car batt got extra electrical boost from alternater than just running on standalone batt power.

and that roaring noise i suspect could be aircon compressor trying to pressurize the system, which can be very obvious when there's no other loud noise like engine noise to cover it up.

[Guest io5885]

yo bro,

i off my a/c n layleo b4 i off engine one. :bounce:

[Guest blackmercs]

Shutting off the air con before the engine is an old school method. I m surprise till now many of u guys are still practising it. I guess this is kind of the old practise that never be changed. Like engine run in & oil change. New conti engine does not require to run in for brandnew & oil change after 10,000 km or more. My new ride require no engine run-in & oil change only after 25,000 km. I got shock but I learn to accept new changes as I m sure the makers wouldn't want to "fail to plan or plan to fail" .

[Guest vincemerz]

blackmercs wrote:

Shutting off the air con before the engine is an old school method. I m surprise till now many of u guys are still practising it. I guess this is kind of the old practise that never be changed. Like engine run in & oil change. New conti engine does not require to run in for brandnew & oil change after 10,000 km or more. My new ride require no engine run-in & oil change only after 25,000 km. I got shock but I learn to accept new changes as I m sure the makers wouldn't want to "fail to plan or plan to fail" .

Maybe they hope faster spoil then faster buy new car hahaha

[Guest kepiting1sg]

IMHO,

In our kind of weather - heat & humidity - tends to breakdown the engine oil easier.

What may last in ang moh land may not last as long here....ummm!!!.....better be safe than be sorry.....hehehehe!

I sipeh kiasu one - though I did not do the smlc old school practice of 1st 500km or 1K km oil change - I always keep to my oil change every 6 mths.

Changing oil more often mean more $$$ as compare to the cost of our cars $$$....hehehe!