Branson 6530C still having AC issues

[Cougsfan]

What I'm about to say might raise some hackles,maybe yours or maybe not but there's far too many sore toes around to avoid stepping on them from time to time. This thread could easily serve as poster child on how not to get things done. Right out of the box op asks for information he can pass along to someone he has hired. I can't explain all the reasons why this wrong but no professional in any field wants to hear what some joker on the web said. Most said what the issue is but never said how to prove or eliminate that issue. The same opinion of issue was repeated even though op had already assured that had been eliminated. The first day op posted and gave a few symptoms,someone said "If what you said is accurate (100% of first charge was still in system when evacuated and recharged) the only thing that makes sense is admittedly far fetched but here gos. If high pressure side has over pressure protection,therein could lie the answer." To my knowledge the suggested tests were never done but 2 weeks later,a part replacement and another evac & recharge it became obvious. When you consider that he said "the only thing that makes sense" and gave simple instructions for testing rather than just blurting out a possible issue and leaving it at that,you might think the guy was serious. Which brings use to sitting here over 2 weeks later "running in circles". If you think the guy just made a lucky guess,maybe he could be convinced to try his hand again. If you think the guy might apply common sense,a little science and experience to troubleshoot instead of randomly guessing,maybe look there for a path forward from here.
In summation,it's difficult to hear what is being said,much less weigh it when the whole room is shouting. Troubleshooting is about testing then using common sense to evaluate test results. As for going to the manuals,that's the first step but the manual is written with the expetation reader understands the principles and will combine them with specs. Most important,this same movie plays out every day over and over but it doesn't appear we learn anything and just keep on doing it. That's my 2 cents,spend it wisely.

Thanks for pointing out that we don't live in a perfect world. You are correct that forums are indeed a source of bad information and it isn't presented in a unified and systematic manner to people with an equal level of understanding and knowledge. But buried inside that it can also be a source of good information. You just have to sort through it. We all should understand that. Sometimes something less than perfect is much better than nothing at all. That's my 2 cents, I'd put in in savings.

 

[Branson Bob]

Thanks for pointing out that we don't live in a perfect world. You are correct that forums are indeed a source of bad information and it isn't presented in a unified and systematic manner to people with an equal level of understanding and knowledge. But buried inside that it can also be a source of good information. You just have to sort through it. We all should understand that. Sometimes something less than perfect is much better than nothing at all. That's my 2 cents, I'd put in in savings.

To add, the posts in this topic are motivated only by good intentions.

It's up to any and all to sift through the information to find the kernels of value.

 

[Mud2Money]

I am not familiar with this models components but I would assume it has a pressure switch. Has anyone changed it ? I had a f250 that would run cold for a short while then go hot. Shut the air off and turn it back on. It would blow cold then cut off. The pressure switch ended up being bad. After it was replaced no more issues.

 

[Gator6x4]

I had a friend (Deceased now) than owned/ran a large vehicle repair and Service Center. He in the last years of operating the Business refused to work on AC Systems.

I have doubts in my mind that this AC unit will ever be repaired. I think the poster said the pressure switch and expansion valve and compressor has been replaced.

He is now talking about direct wiring the compressor. If he has a question about whether a system component in the system is causing the short cycling this is like going to Hong Kong to solve a problem that is occurring in the Virgin Islands.

Direct wiring of the compressor for a very short period of time why closely monitoring pressure gauges will determine if the Compressor Clutch assembly is bad and provide information that a AC component is not causing the short cycle problem and it is the AC compressor clutch assembly that is causing the problem. Extreme high pressures and component damages can occur by direct wiring.

Hook gauges to the Unit. Start the tractor and watch the gauges. Does the high or low sides go up and then the compressor starts short cycling. Yes - No. If no, stop the tractor, put a jumper wire on the High Pressure switch. Restart start the tractor watch the gauges to assure no excessive pressure builds up.

Does the compressor short cycle with the pressure switch jumperEd, Yes - No. If yes the problem is not the pressure switch. Turn the tractor off, remove the jumper wire from the pressure switch and reconnect.

Go inside the vehicle. Look at the interior temperature control. Is it manual or digital electronic. Can you easily get to the wires on the back of the temperature control? Does the interior unit have blend doors controlled by a controller which is controlled by the interior temperature measuring device?

Either turn the temperature control to it’s lowest position or jumper the temperature control. Restart the tractor does the tractor short cycle or operate continuously now? Operate continuously then your problem is not the temperature control. If compressor continues to short cycle with the temperature control set to it's lowest position or jumpered your problem is the temperature control.

 

[jaxs]

To add, the posts in this topic are motivated only by good intentions.

It's up to any and all to sift through the information to find the kernels of value.

Thank you for your view. How does one know which is chaff and which are kernels of value unless they are already well versed ,in which case they wouldn't be asking for help?
I seem to have a problem figuring out whether a poster is asking for help or or looking for entertainment. In the words of this thread's OP "And true, not everyone has good information, but most are trying to be helpful on this forum and it make for interesting reading. Cheers"