a/c compressor making loud noise
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
The compressor is already shedding it's innards into the system, so a flush will be necessary. If you wait until it fails completely, there will be metal chunks lodged in the condenser and flushing won't remove them.
Disconnect the electrical connector at the compressor until you get it repaired.
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
So the system was worked on recently? What was te problem? what was done?
An overcharge of refrigerant can cause a groaning type noise, and can also quickly damage the compressor. We need "the rest of the story".
An overcharge of refrigerant can cause a groaning type noise, and can also quickly damage the compressor. We need "the rest of the story".
Posting Guru
Joined: May 2002
Posts: 2,450
Likes: 2
From: Baltimore
If they evacuated the sentire ystem, you need to make sure 2 oz of oil is enough. It seems low to me, but I don't know what year you have. There are lots of web sites that will tell you how much oil it needs. As previously suggested, you should unplug the compressor until you figure this out.
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New User
Joined: Apr 2008
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ok...this is the story..i heard a rattling sound coming from the ac compressor...i just ignore it..because the ac still blows cold air a few weeks later i noticed the air gets warmer..i decided to bring the car to the ac repair shop..they said it's low on freon so they add some freon in..then the ac blows cold air again..after a few hours it's blows warm air. so i get back to the shop and they said the compressor is about to give up! then they vacuum out the system put some R134a oil in it charge the system..then the ac blows cold air again! after a few days i noticed the compressor is making a very loud noise like it's grinding in something...but the ac still blows cold air...
Fleet Mechanic
Joined: Feb 2006
Posts: 1,776
Likes: 5
From: Lorain County, Ohio
ok...this is the story..i heard a rattling sound coming from the ac compressor...i just ignore it..because the ac still blows cold air a few weeks later i noticed the air gets warmer..i decided to bring the car to the ac repair shop..they said it's low on freon so they add some freon in..then the ac blows cold air again..after a few hours it's blows warm air. so i get back to the shop and they said the compressor is about to give up! then they vacuum out the system put some R134a oil in it charge the system..then the ac blows cold air again! after a few days i noticed the compressor is making a very loud noise like it's grinding in something...but the ac still blows cold air...
The engine in your truck would run for a while with a rod knock, but would you keep driving it? Apply that logic here.
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