I'm having my dual AC (front and rear) AC hooked up and my AC shop is
concerned that that the electric cooling fan which comes on when the AC is
turned on is not pulling enough air over the condenser when the van is
stopped.

The fan is shrouded and has two speeds depending on the temp of water
exiting the radiator.  It comes on low speed whenever the AC is turned on.

We are considering jumping the fan switch to have it turn on at high speed
whenever the AC is on.

Anyone done anything to increase the power or efficiency of the stock
cooling fan??

Warren C