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Old 18th February 2010, 20:20   #31
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checked the temp of the air flowing through the centre grille with the temp knob at the coldest setting and it registered ~4.3 to 4.5 degrees celcius.
That is chilling temperature,I must say;ten degrees is what I have seen
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Old 19th February 2010, 16:31   #32
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mine too around 5 degrees at the grill. when my ac wasnt cooling properly the grill temp was around 9-10 degress. that was too high according to the service manual. so i serviced the AC
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Old 19th February 2010, 17:04   #33
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when my ac wasnt cooling properly the grill temp was around 9-10 degress. that was too high according to the service manual. so i serviced the AC
Thanks for your input. Would it be possible for you to elaborate a little more on the 'service' procedure that you did?

Thanks,
gpa
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Old 19th February 2010, 18:11   #34
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gpa, dont fret much your ac is fine & you really dont need to ready it for summers. My Alto would be completing 5 years this year & the ac has given me no problem what so ever & I keep using ac off & on.
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Old 19th February 2010, 18:56   #35
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Thanks for your input. Would it be possible for you to elaborate a little more on the 'service' procedure that you did?

Thanks,
gpa
Go to MASS, they will take out the entire dashboard. clean the cooling coils, condenser and the evaporator as well.
they will also clean all the ducts thoroughly and even the blower. i was shocked to see the dirt in all these above. make sure they change all the O-rings of the joints removed especially the high pressure line.
Gas charging along with Oil follows the next. AC servicing ensures your cooling is at its potential and the oil ensures lubrication to the compressor.
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Old 20th February 2010, 17:57   #36
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Cleaning the evaporator would involve discharging the system. You will have to pay again for a full gas recharge. Plus there is risk of those jokers goofing up somwhere... you might want to get it done under your supervision. So if cooling is fine, and gas pressure is also fine, you might want to consider just cleaning the blower and the condensor. The later can be done regularly and easily by using compressed air.
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Old 20th February 2010, 22:26   #37
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during AC servicing they remove the entire gas and a fresh charge is done. they anyways charge 2500rs at MASS.
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Old 21st February 2010, 01:01   #38
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^^^Thats way higher than what you will pay by going to an AC specialist.... esp. for a R134a system. Besides it seems everyone is venting the refrigerant into the atmosphere! So not a great idea to do it unless its really necessary... else you are polluting big time, esp. if its a R12 system.

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Old 21st February 2010, 11:19   #39
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^^^Thats way higher than what you will pay by going to an AC specialist.... esp. for a R134a system. Besides it seems everyone is venting the refrigerant into the atmosphere! So not a great idea to do it unless its really necessary... else you are polluting big time, esp. if its a R12 system.
no the MASS doesnt vent it to the atmosphere. not a good practice. they hook in a machine which evacuates the gas. after the servicing the same machine is set for 20 min to vacuum the line and then fresh charge is done perfectly calibrated.

i had earlier done it from AC specialist for 1200rs who vented the gas out, dint have the machine so dint use vacuum technology at all. the end result was leaking gas due to busted o-rings. even the gas charging method they use seems to be crude. they shake the bottle and charge the gas. god knows how do they exactly calibrate the amount of gas.

but in pune there are AC experts who have those machines. but they charge more.
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Old 21st February 2010, 16:14   #40
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^^^Thats great... venting it into the atmsosphers is illegal abroad. But here, it seems anything goes.

My ac developed a leak and I got it fixed just couple days back. Wanted to post my experiences on tbhp, but just could not get time. The ac guy did have a small vacuum machine with which he vacuumed before filling in R12. I guess he did it for about 20 mins, but I did not note the duration exactly. Vacuuming is absolutely necessary, else the AC will not cool well. But how would not vacuuming lead to busted o rings??

The "calibration" you mentioned can be done thru a pressure gauge. Thats how most of them do it... don't know if there are machines that do this automatically...

Don't know why they shook the cylinder before filing in your case. Maybe it was low on pressure? AFAIK, the cylinder should be held upright while filling, so only gas enters the system.

Do you know any AC specialists in Pune who have the required equipment and who are really good? Please do let me know. MASS are not ready to even touch R12 systems.

Those using R134a - you get small sealed, branded cylinders. Can't recall the brand name. Best to use these for filling up as you can at least be sure of the purity. Haven't seen such cans of R12 though. Anybody knows if they are available anywhere?

Last edited by Raccoon : 21st February 2010 at 16:17.
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Old 21st February 2010, 23:54   #41
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^^ i have seen a good equipped AC specialist on JM road in the same lane where hotel bamboo house is located. i have seen mercs and skodas being done there
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Old 22nd February 2010, 00:14   #42
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Bamboo House Hotel... is it more towards Sanchetti Hospital or towards Deccan? Do you have any personal experience with them? My last AC guy tried to take me for a ride. If I had listened to him, I'd be without an AC as of now. So I'm very wary. Thanks anyway.
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Old 22nd February 2010, 09:26   #43
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....
4.3 C grill temp. seems pretty good... but would depend on the ambient air at that time. ....
And would also depend on blower speed setting! Higher the blower speed, higher the outlet temperature is going to be.
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Old 22nd February 2010, 10:42   #44
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gpa, dont fret much your ac is fine & you really dont need to ready it for summers.
Thanks, Techno. When it ain't broke, why fix it?

Quote:
Originally Posted by amit_mechengg View Post
Go to MASS, they will take out the entire dashboard.
Quote:
Originally Posted by Raccoon View Post
Plus there is risk of those jokers goofing up somwhere... you might want to consider just cleaning the blower and the condensor.
Amit and Raccoon,

One of the reasons I did not want MASS to open up the entire dash was because I have sealed off the fresh air intake the second day after I bought the car, so the cooling coils beneath the dash would be relatively clean though the car is nearly 2 years old.

I have used an a/c neutralizer last May to give the cooling coils a good clean also disinfecting them and my fan/blower is clean (no stuck twigs, leaves) so I didn't want them unnecessarily opening up the entire system. I guess, I can manage for another year (my a/c usage is relatively low since the temp is relatively manageable in Blore for most parts of the year) before I can get the evaporator cleaned and the charge the system wit gas.

Thanks for your inputs.

Regards,
gpa
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Old 22nd February 2010, 13:40   #45
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@gpa- Eggzactly especially when you own India's largest selling car with the biggest A.S.S. to take care of issues if any
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