Quote:
Originally Posted by JCSC2
I have previously reported in threads about my a/c not working well in my 300SD. But today my employee/buddy has brought in an a/c gauge. It has levels indicated on it for the low and high side. How do I go about checking the amount of R134 in the system? Also how much does it hold? I apologize I did not search hard and it's probably be spoke of dozens of time. We are at work now. Thank-you.
Also for a recap my a/c sucks! It puts out on only moderately cold a/c if car is moving along at a good pace and not stopping. If you stop at a light or in stop and go traffic, the a/c puts out hot air. Also it makes a bad whistling noise when you stop or shut off a/c. Like it is releasing a lot of pressure. Also it sounds like the compressor(or something) is "ticking" while running. Stops when it is shut off. Any suggestions and ideas are greatly appreciated. The car was converted to R134 some years ago. When my Mom owned the car(been in family since 91) she had R134 added from time to time.
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The gauges don't have "level" indicators on it. It has pressure & temperature, which you left out of your message. We need to know the high side pressure, the low side pressure and the outside air temperature.
That said there is really no way to know exactly how much refrigerant is in there. There are 2 ways to find out.
1-Recover the refrigerant into a recycle container and weight it.
2-Flush out the system and replace with the proper amount of refrigerant & oil.
That last comment in bold scares me. When refrigerant leaks out, oil leaks out with it. Not only do you not know how much refrigerant is in there you don't know how much oil is in there either.
Get too low on the oil and your compressor WILL seize up.
Danny