You won't get the full output of the fans if you wire them in series.
Assuming the fans are identical, you will essentially be running each
fan at ~6V.

MM

>From: Kevin Mikkelson <kevinm@RED.PRIMEXTECH.COM>
>
>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?

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