Availability of 10B21275N Circuit Board for MaxxFan 8900N

Updated 09/02/2026 | Published 08/28/2026

Question:

I am looking for a 10C21275N OR a 10B21275N circuit board for a model 8900N Maxxair RV roof vent. TIA

asked by: John A

Expert Reply:

Hey John! We have the 10B21275N circuit board you're looking for. The Replacement Printed Circuit Board # MA32WV is the same as the 10B21275N and will work with your 8900N MaxxAir roof vent.

What kind of trailer are you working on?

expert reply by: Robin H

Replacement Printed Circuit Board
(click to enlarge)

John A.

9/2/2026

It's on a Renegade motorhome. Do you have a good pic of the pins/plug? Also, how much is it plus shipping and how soon will I get 2 of them?

Robin H.

9/2/2026

@JohnA I can't attach more pictures here but if you look at the product page you can see pictures of the plugs. It looks like they're 21 days out right now, shipping will be free as long as you're within the contiguous USA.

John

9/2/2026

@RobinH Where are there more pics at and how do I navigate to it? My boards have two four pin plugs and one two pin plug. The one picture does not have the two pin plug. John

Robin H.

9/2/2026

@John click the hyperlinked product # MA32WV. The 5th photo over is the connectors. It has two 2-pin connectors so that doesn't quite line up. I didn't cross referenced the part vs what you have so apparently that circuit board isn't compatible with that fan. We don't have the 10C21275N, only the variant ending in K, but both of those appear to have the same two 2-pin connectors.