Sound In Ac Compressor

[SAB]

Hi guys,

I got frustrated on reparing the AC compressor again and again in my Allion 240 (2002 model) car.

The initial problem was a " trrrrrrr" sound coming from the AC compressor. My AC technician instructed me that the Compressor has worn out, therefore I had to replace it.

So I replaced it with a reconditioned AC compressor. But now the problem is the side plate attached to the pully is rotating with a bad sound when the AC is turned off.

Technician fixed it several times and faced the plate surface from a lathe also. And he increased the gap between the belt and the plate.

But the problem exists.

Is there any errors in the condensor? could any one please advise me.

[trinity]

  On 4/1/2013 at 11:20 AM, SAB said:

Hi guys,

I got frustrated on reparing the AC compressor again and again in my Allion 240 (2002 model) car.

The initial problem was a " trrrrrrr" sound coming from the AC compressor. My AC technician instructed me that the Compressor has worn out, therefore I had to replace it.

So I replaced it with a reconditioned AC compressor. But now the problem is the side plate attached to the pully is rotating with a bad sound when the AC is turned off.

Technician fixed it several times and faced the plate surface from a lathe also. And he increased the gap between the belt and the plate.

But the problem exists.

Is there any errors in the condensor? could any one please advise me.

Change the technician..

[MV-5]

i came across this kind of problem. problem was "bad Bearing".(belt coupled to the pully , since pully rotates the bearing works even when the ac is switched off).

. once it has been replaced problem solved.

Edited April 1, 2013 by MV-5

[SAB]

  On 4/1/2013 at 11:49 AM, MV-5 said:

i came across this kind of problem. problem was "bad Bearing".(belt coupled to the pully , since pully rotates the bearing works even when the ac is switched off).

. once it has been replaced problem solved.

Thanks a lot MV-5 for your immediate response. I'll try it and let you know.

And finally I forgot to mention, my technician suggested to replace the condenser since the problem might be due to the condenser. Because of I have no idea abt this subject, I have to agree with him.

May I know, with this problem, is there any connection with the condenser?

Edited April 2, 2013 by SAB

[maheshw]

hi i have pm you. check your inbox.

[SAB]

  On 4/2/2013 at 4:56 AM, maheshw said:

hi i have pm you. check your inbox.

Hi Mahesh,

That's the place I have already visited. I think he's genuinely doing the job. Repair wk is going on these days. He did some remedial works but not succeeded yet. I hope he'll solve the problem.

Thanks mate.

[MV-5]

  On 4/2/2013 at 3:06 AM, SAB said:

Thanks a lot MV-5 for your immediate response. I'll try it and let you know.

And finally I forgot to mention, my technician suggested to replace the condenser since the problem might be due to the condenser. Because of I have no idea abt this subject, I have to agree with him.

May I know, with this problem, is there any connection with the condenser?

No machan, it has no connection with condenser. it is a small bearing. you said that compressor make a noise when AC is switched off. it is the exact symptom of bad "bearing".

some people say it as "AC Bearing".

[SAB]

  On 4/2/2013 at 5:37 AM, MV-5 said:

No machan, it has no connection with condenser. it is a small bearing. you said that compressor make a noise when AC is switched off. it is the exact symptom of bad "bearing".

some people say it as "AC Bearing".

Thanks mate. Highly appreciate your advice. I'll check it soon.

[maheshw]

  On 4/2/2013 at 5:25 AM, SAB said:

Hi Mahesh,

That's the place I have already visited. I think he's genuinely doing the job. Repair wk is going on these days. He did some remedial works but not succeeded yet. I hope he'll solve the problem.

Thanks mate.

ok he is genuinely doing his work have visited there few time & done great jobs for me.

[tilvin]

  On 4/2/2013 at 3:06 AM, SAB said:

Thanks a lot MV-5 for your immediate response. I'll try it and let you know.

And finally I forgot to mention, my technician suggested to replace the condenser since the problem might be due to the condenser. Because of I have no idea abt this subject, I have to agree with him.

May I know, with this problem, is there any connection with the condenser?

Hi Friend,

Better you check with another good A/C repairing centre. Because some repairing technicians do not know what they are doing and messing up everything. I had several experiences with bad technicians. Better check with someone who knows the thing, not by mere reputation or name.

Edited April 3, 2013 by tilvin

[MV-5]

Anyway this is the problem i suspect..

http://www.justanswer.com/gm/2yhcf-know-a-c-clutch-bearing-bad-compressor.html

[The Don]

  On 4/2/2013 at 3:06 AM, SAB said:

Thanks a lot MV-5 for your immediate response. I'll try it and let you know.

And finally I forgot to mention, my technician suggested to replace the condenser since the problem might be due to the condenser. Because of I have no idea abt this subject, I have to agree with him.

May I know, with this problem, is there any connection with the condenser?

The condenser is the radiator like panel attached to the line into the compressor. It's job is to cool down the decompressed air from the evaporator. Since it has no moving parts it should be silent in operation.

Edited April 3, 2013 by The Don

[SAB]

  On 4/3/2013 at 11:20 AM, MV-5 said:

Anyway this is the problem i suspect..

http://www.justanswer.com/gm/2yhcf-know-a-c-clutch-bearing-bad-compressor.html

Thanks a lot MV-5. Your video clip was very useful. I followed through it carefully several times. Regarding the AC bearing, my technician has replaced it while replacing the Compressor.

Actually, it's the "AC clutch" which I have mentioned above as the "Side Plate" (I learnt it by the video clip ). It rotates randomly when the AC is switched off. Only then, the sound occurs. When I asked abt the AC bearing fact from the technician, he disagreed cos he has replaced it.

He's pointing out this happens because of the condenser failure. According to his idea, as the condenser is not cooling down the decompressed air properly, it has affected to the AC clutch. (also he told that the bottom part of the Condenser is heated )

As Don mentioned above, condenser may not be occurring the sound, but it's failure may causes the sound in AC clutch. (Am I correct? If not, please advice)

And finally his suggestion is to replace the condenser. I still trust on him as he's a genuine character and his place is one of the best place in Kandy.

Do you guys have any comments please................??

[MV-5]

if you can clearly see that "plate" rotates when ac is switched off then you have identified problem.

normally this plate should maintain a small clearance. if i understood correctly sometimes it will not maintain this gap and plate will touch (not fully engaged the clutch) and this makes the noise.

then simply , something is wrong with the this mechanical parts.

it might be a problem in AC clutch it self or some external problems alter the proper behavior of AC clutch.

your technician thinks that faulty condenser alter the proper behavior of the AC clutch.it is also possible (since your technician competent enough)

then the best option is if you or ur technician can find a condenser and attach it temporally and see.

and the other thing is there is a small coil(just like insulation tape role) which magnetize the clutch to be engaged.due to some problems in relays sometime this coil might try to magnetize the clutch when ac is switched off.but this is very rare kind of problem. then clutch might try to partially engage.

Edited April 7, 2013 by MV-5

[SAB]

  On 4/7/2013 at 6:04 AM, MV-5 said:

if you can clearly see that "plate" rotates when ac is switched off then you have identified problem.

normally this plate should maintain a small clearance. if i understood correctly sometimes it will not maintain this gap and plate will touch (not fully engaged the clutch) and this makes the noise.

then simply , something is wrong with the this mechanical parts.

it might be a problem in AC clutch it self or some external problems alter the proper behavior of AC clutch.

your technician thinks that faulty condenser alter the proper behavior of the AC clutch.it is also possible (since your technician competent enough)

then the best option is if you or ur technician can find a condenser and attach it temporally and see.

and the other thing is there is a small coil(just like insulation tape role) which magnetize the clutch to be engaged.due to some problems in relays sometime this coil might try to magnetize the clutch when ac is switched off.but this is very rare kind of problem. then clutch might try to partially engage.

Your knowledge is awesome mate...!!!

My technician also noticed me abt that fault regarding the coil. According to him, that fault was also there and he has repaired it. After that repair, there was no noise for 2-3 days. The plate was not rotating when the AC is switched off. But after that the fault raised again.

Then he pointed me abt that fault in condenser. Before replacing a condenser, he dismantled the whole Unit (Ac compressor) and replaced it with another reconditioned compressor because he wanted to show me that there's no problem with that previous AC unit any more.

And asked me to drive for 2-3 days and if the noise arises again, his conclusion would be replacing the faulty condenser.

Now I think his assumption is correct, because after driving only 2 days that plate started to rotate and noise started again. Tomorrow I'd be going to his place again (may be for the 7th time) and ask him to do what ever he think to recover this. (cos I got fed up of this ... )

Thankx again mate, I'd come back to you again after that. Highly appreciate your advises...!

[Rumesh88]

I do not know if I am too late to respond. MV-5 had a point which seems to have gone unnoticed. If it is possible get your tech to check whether AC clutch is energized by a spurious electrical signal. Can be done easily by connecting a small 12V bulb (parking light) across the connection to the clutch.

[SAB]

Hi Guys!

After 2-3 busy weeks I released a bit.

My tech. decided to go for a new AC compressor (Thailand made) after changing 2 reconditioned air compressors cos they didn't suit to my car. Before that he flushed the condenser using a special kind of chemical. I could observed that a large amount of sludge has flushed out.

Then the new compressor fixed and he asked me to use for 2-3 weeks and to meet him again.

Till today there's no big issue.

Have you got any idea abt. those compressors made in Thailand/Taiwan? Are they durable? Of course it may not as good as Japanese one. But comparing with the prize, the Japanese one is very expensive.