Automotive Air Conditioning Information Forum (Archives)

ML320 on Fri May 04, 2012 1:33 AM

Year: 2000
Make: ML320
Engine Size: 3.2
Refrigerant Type: ?
Ambient Temp: 78
Pressure Low: 45
Pressure High: 30

My AC is blowing cold ~62oF. I put the gauges on my system, and measured 45psi on the low side, and 35psi on the high side. My ac fans and compressor run for 5-10 seconds before shutting off, then 5 seconds, and back on.
Any possible suggestions for low high side, fans and compressor shutting on and off, and a solution?

Cussboy on Fri May 04, 2012 10:24 AM

Quote
Originally posted by: ML320
My AC is blowing cold ~62oF. I put the gauges on my system, and measured 45psi on the low side, and 35psi on the high side. My ac fans and compressor run for 5-10 seconds before shutting off, then 5 seconds, and back on.

Any possible suggestions for low high side, fans and compressor shutting on and off, and a solution?

Sounds like you have a leak that needs to be fixed, and you're now very low on refrigerant.

ML320 on Fri May 04, 2012 7:59 PM

So what, add more refrigerant, and that will bring up my high side?

JJM on Sat May 05, 2012 1:42 PM

Sounds like most of your refrigerant is gone, which means a lot of oil is likely gone too. Charging it up without fixing the leak and adjusting the oil level would be the equivalent of ML running low on oil and running out fuel, then just fueling up. You know what's going to happen next. Mercedes engine work won't be cheap.

Joe

When considering your next auto A/C purchase, please consider the site that supports you: www.ACKits.com

ML320 on Tue May 15, 2012 6:15 AM

For now I need a quick fix till the end of this year. Will adding freon fix the problem for now, or do I need to evac the system? Could there be a blockage that is causing the low high side, or is the low high side simply due to no freon.

Cussboy on Wed May 16, 2012 12:36 PM

Quote
Originally posted by: ML320
For now I need a quick fix till the end of this year.


You drive a 2000 Mercedes and can't afford to fix it correctly? And I drive a 1988 Mazda truck, can afford to have it working properly, and own my home free and clear. What's wrong with this picture ???

TRB on Wed May 16, 2012 6:40 PM

Sounds like you want to hear fill it up over and over again. That's an option you can consider. But is not recommended for many reasons.

My advice is find the leak. Repair it. Evacuate & recharge to OEM specs.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

ML320 on Wed May 23, 2012 8:35 AM

Quote
Originally posted by: Cussboy
Quote
Originally posted by: ML320
For now I need a quick fix till the end of this year.





You drive a 2000 Mercedes and can't afford to fix it correctly? And I drive a 1988 Mazda truck, can afford to have it working properly, and own my home free and clear. What's wrong with this picture ???

Holy shit, I can't believe that I have to produce a fucking W2 form just to get an answer to a common a/c problem. Nice on the '88 Mazda truck and and owning your home free and clear, congratulations you are ghetto rich. Since when does a 12 y/o vehicle depict the status quo for the better?

My problem is stated, my reason is simple; need patch work for now, till I find the time this winter.



Edited: Wed May 23, 2012 at 8:36 AM by ML320