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A/C compressor question

4740 Views 18 Replies 11 Participants Last post by  indyflick
As you can well imagine, living in Tucson, the A/C spends a lot of time running. In fact, my battery guess-o-meter said 32 miles this morning, primarily due to the heat.

My question is more curiosity than need-to-know, but I've listened to the compressor many, many times and it sounds like it is a variable speed unit. I did some searching on this forum and learned that the compressor is A/C (alternating current), 3-phase, and 300 volts. But, I did not find an answer as to whether it is multi speed or variable speed.

My home A/C compressor is multi speed, so I'm familiar with that as the two different speeds are very distinctive. The Volt, however, certainly sounds like a variable speed unit. Just curious if anyone knows for sure.

I was certainly pleased to read in my searching that the A/C compressor is considered part of the Voltec system and is covered under the powertrain warranty. Another big plus for the Volt, and for GM.
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My 2014 gen1 compressor seemed to be a multi-speed about 6 setting or so. It is just a guess but when it changed speed it always jumped in a given amount of speed ... say 200 -300 -400 RPM.
What I am saying it was not a ramping up variable sound but more like a segmented sound as it gained speed.
Which may or may not be result of the software, just like the engine only runs at 1400, 2500, 3500, etc RPM
Doesn't mean the engine is not able to run at 1556rpm if the software commanded it.
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