Replacement network control circuit board for select Maxxair MaxxFan and MaxxFan Deluxe RV roof vent models, including commonly listed 4700N, 4900N, 8700N, and 8900N applications.
The Maxxair 10B21275N is a replacement network printed circuit board for select Maxxair powered RV roof vent fans. The control board acts as the electronic control center for compatible MaxxFan systems, helping manage fan operation, powered lid functions, and communication with compatible network-style controls.
This board is commonly listed for Maxxair 4700N, 4900N, 8700N, and 8900N roof vent models. Because Maxxair uses several very similar circuit board part numbers across keypad, remote, gateway, diagnostic, and network versions, the existing fan model number and original board number should be confirmed before ordering.
Replacement printed circuit board for compatible network-style MaxxFan roof vent systems
Commonly listed for 4700N, 4900N, 8700N, and 8900N roof vent models
Helps control fan operation, lid functions, and compatible electronic fan features
Includes the control board only; fan, lid, motor, keypad, and wiring parts are separate
This is a model-specific electronic replacement part and is not universal for every Maxxair roof vent. Before ordering, confirm your complete fan model number and compare the original circuit board part number. Similar MaxxFan models may use 10B21275K, 10B21275KE, 10B04751KS, 10-21275N, 10-21275NZ, or other board versions that are not interchangeable.
The 10B21275N is commonly sold as a PC Board Network / roof vent control circuit board for select Maxxair network roof vent models. Replacement Part Number: • 10B21275N Commonly Listed Compatible Models: • 4700N • 4900N • 8700N • 8900N Related Maxxair Board References: • 10-21275N for 4700N / 4900N network models • 10-21275NZ for 8700N / 8900N network models Because board revisions and suffixes matter, confirm the original board number before ordering.
In The Box: • One Maxxair 10B21275N network printed circuit control board Not Included: • Roof vent fan assembly • Vent lid or rain cover • Fan motor or fan blade • Lift motor or operator mechanism • Rain sensor • Keypad, wall control, or handheld remote • Interior garnish or screen • FanMate vent cover hardware This is a replacement control board only. Existing compatible fan components are reused unless they are being replaced separately.
Replacement Overview: 1. Confirm Model: Verify your MaxxFan model number and original board part number before ordering. 2. Disconnect Power: Turn off 12V power to the roof vent fan before servicing electrical components. 3. Document Wiring: Take photos of existing connections before removing the old board. 4. Inspect Related Parts: Check the fan motor, lift motor, keypad, rain sensor, wiring, and lid movement if the fan is not operating correctly. 5. Remove Old Board: Carefully disconnect wiring and remove the failed or damaged circuit board. 6. Install New Board: Mount the replacement board and reconnect wiring exactly as required for your compatible model. 7. Restore Power: Reconnect 12V power after installation is complete. 8. Test Operation: Verify fan speeds, lid movement, network control response, and any automatic features before travel.
This replacement control board is best suited for RV owners or service technicians repairing a compatible Maxxair network-style roof vent fan after confirming that the original board number and fan model match this replacement part.
Before placing your order, verify the complete MaxxFan model number and compare the part number printed on your existing circuit board. This part is a replacement network PC board only and does not include the roof vent fan, lid, fan motor, lift motor, rain sensor, keypad, remote, screen, garnish, or FanMate cover hardware.