- Buick Ownership
- 1996 Roadmaster Limited Collectors Edition 58k - 1996 PAU
The control valve can be replaced, but may require removing the compressor.
Nothing else was performed. The Tech seems to be very knowledgeable therefore, I did not dare to question him...
Get a second opinion from a shop
Thank you all for your supports!
I too found it difficult to accept the fault is the compressor due to the High Side pressure is Normal.
How can I troubleshoot the expansion valve? Both Low Side and High Side gauges equalized once the engine shut off. What is the pressure switch, and could it cause this issue?
Thank you, Mama’s Lacrosse, and other supporters, for your inputs. I am still trying to digest all information given here and have not done anything yet. I would like to learn all AC system components and its function for this car. Does anyone have the AC system layout and its components?Well, have you made any progress?
I've got a stupid question for HotZ28 or anyone else that will answer this for me. Do all Lacrosse's or all Buicks for that matter have auto HVAC systems after 2010? Or I guess what I'm asking is are all A/C compressors of a variable displacement type after a certain year?
The V5 (variable displacement) compressor was used & available in 1996, not any that I recall before that? The HR6/HD6 was common during the previous years.I've got a stupid question for HotZ28 or anyone else that will answer this for me. Do all Lacrosse's or all Buicks for that matter have auto HVAC systems after 2010? Or I guess what I'm asking is are all A/C compressors of a variable displacement type after a certain year?
Thank you, HMTJ6821, and all other Supporters! It is what it is... If it needs to be replaced, will get replaced.I know that an AC compressor replacement is expensive––I had it done on my 2010 LaCrosse. The diagnosis was that the compressor was not "sucking" strongly enough on the low side. Your observations appear to be similar. I do sympathize with your desire to explore all other alternative causes but consider this; the replacement compressor will come with a lifetime warranty. Of course, this does not cover the labor to remove and replace at a later date.