[Andy Peacock]

Removing and replacing negative battery cable makes AC work.

 

[DRMAK]

My Spark does that too. First time happened I panicked. I was waiting inline for drive through when the air became hot and humid. After I drove away, it came back cold. It happened many times after that, usually when idling.
So, just remove the battery pole and put it back, like a power cycle?

 

[ArcherRunner]

Removing and replacing negative battery cable makes AC work.

i had the same issue. issue with mine was the ac pressure switch. go to a local junkyard and get a new switch its on the ac compressor.
my father inlaw diagnosed it with multimeter
it might work for you

 

[ArcherRunner]

My Spark does that too. First time happened I panicked. I was waiting inline for drive through when the air became hot and humid. After I drove away, it came back cold. It happened many times after that, usually when idling.
So, just remove the battery pole and put it back, like a power cycle?

i had the same issue. issue with mine was the ac pressure switch. go to a local junkyard and get a new switch its on the ac compressor.
my father inlaw diagnosed it with multimeter