Off line Bill and I have been discussing the wiring of additional fans
behind a Dometic refrigerator.  I wired mine in series he in parallel.
Parallel advantages:
With a parallel set up if the first fan in the series burns out the second
fan would continue to operate.
With a parallel set up it is possible to wire a switch to manually turn off
the selected fan.
Series advantage:
If one fan fails the circuit fails and you know you have a failure, if you
notice no fan noise.
Mine is already wired in series, if no major safety concerns I will not
have to rewire.

I wanted to get the lists opinions, are there any unseen dangers (current
draw?) in my wiring the stock fan in series with a second fan?