What should the climate control do when you floor it?

[MarkVIIIMarc]

Another thread got me thinking....

Now I don't go around at 6,000 RPMs in my 230,000 mile driver all that often but since I've gotten my car in 2010 when I absolutely floor it the A/C seems to switch off and I get warm air until I start driving like a responsible human again. That other thread also has me wondering if it switches to the defrost at all....can't say that I remember but most of the "heating season" I just have the car set to defrost and floor anyways.

I rather assumed this was the compressor turning off to free up another couple of the 275 HP my car had 20 years ago.

 

[tixer]

This is normal operation.

I too thought it was to free up a few ponies, until someone pointed out to me that compressors are prone to failure over a given RPM, and that's the more likely reason for this operation.

 

[steve]

What Mike said and I think it was for both reasons.

 

[chris2523]

yes, early eec iv cars had a WAC. wot ac cutoff relay.
mark viiis probably do as well, even if its moved into the pcm or vlcm or vrcm or whatever now.

 

[BlackIceLSC]

the AC turns off at WOT at a certain rpm (switching valve) to prevent belt slippage and ac over-run(compressor failure).
By design.