I searched the threads for anyone who had a similar issue to this and I couldn't find one. Sorry if I missed one. Some of that comes back to titles people use. Air Conditioning.

My '06 R53 has been showing me what I think is a warning sign, but I'm not sure if anyone has seen this before. If I am running with the A/C on and I come to a stop, the voltage is dropping from an indicated 14 to 12, sometimes dipping a little below that 12 mark just a hair. Without the A/C on, it stays glued at 14.

Any thoughts? It puts out nice cold air - seems to work fine otherwise. is this a trait? We usually don't run the air a lot but have been the past few weeks.

Thanks!

 

normal... not a big deal, it allways happend when the fan starts working.

 

Yep......I just sit at the light and keep the rev's up over 1K.

 

Mine does that too sometimes. Every once in a while when I am running the AC full blast the power in my 2003 MC will drop and seem to almost kill the engine, but then comes back no problem. A very good friend and mechanic told me its pretty normal as long as the engine doesn't actually die.

 

Thank you for your replies! I have been curious if anyone else had experienced the same issue.

 

It comes down to the basics of how much the A/C draws on the battery. You can reference fuse information here: https://www.northamericanmotoring.co...nd-wiring.html. The AC clutch draws 30A, and the fans draw 50A.

Keep in mind the fact you have to rev your alternator above 2K RPM to put it into a charge state. This is especially important when you are attempting to charge someone else's dead battery. If you just let the running vehicle idle, you will never get the other one started.