Are both cooling fans supposed to be running when the air conditioner is on in a 1994 Oldsmobile Cutlass Ciera?
Yes, if there are two cooling fans one operates off of engine
coolant temp. and the other operates off the A/C. The one that
operates off of coolant temp will run for a while then shut off,
then run again and continue to cycle. This is to keep engine at
operating temperature. The other one runs when the A/C is on
because when the compressor engages it puts a load on the engine,
which will create heat beacuase the engine works harder. as long as
both fans operate your okay.