MAXXFAN Plus 00-04500K Roof Vent — Parts & Exploded Diagram

The MAXXFAN Plus 00-04500K is a 12-volt RV roof vent with a powered opening lid, rain sensor and handheld remote. Its replaceable components include the lift motor, lid arm, fan motor, screen and electronic controls. When repairing it, use the 4500K parts entries: other MAXXFAN and MAXXFAN Deluxe models can look alike but have different lids, keypads and circuit boards.

Find the complete fan and commonly replaced parts

Factory exploded parts diagrams

The Airxcel/MAXXAIR illustrated service sheet separates the outer vent assembly from the control plate and the powered-lift base. Use the diagram callouts with the matching numbered parts table below.

Open all three exploded diagrams (PDF)

Complete vent assembly (page 2)  ·  Interior controls (page 3)  ·  Fan and lift assembly (page 4)

MAXXFAN Plus 4500K part numbers

Diagram position Part number Component
Main drawing 12-00057 Smoke-coloured MaxxFan Plus roof lid
Control 1 05-20226K Interior control plate
Control 2A 10B21275K Circuit board listed for 4500K in Airxcel's R-608H parts chart
Control 5 10-40005K Keypad for 4500K
Control 8 05-30925 Round interior insect screen
Base 9 10-20258KS Ventilation fan blade
Base 13 10-20222KS Lid lift arm
Base 14 10-20968 Ventilation fan motor for units built after February 2012
Base 15A 10-40007K Rain sensor
Base 16A 10A20281K-1AF Automatic lid operator mechanism
Base 17A 10-20270 Powered lid-lift motor
Base 18 10-40003K Lid hinge pin

Which motor is the problem?

The 10-20270 lift motor moves the roof lid through the automatic-lift mechanism. The separate 10-20968 ventilation fan motor spins the blades to move air. Airxcel specifies 10-20966 for compatible fans built before February 2012 and 10-20968 for those built afterward. Check your fan's model and serial-number label before choosing the replacement.

Control boards and model revisions

For model 4500K, the illustrated Airxcel R-608H parts chart identifies the original control-board position as 2A, part 10B21275K. The store also has a 10C21275K replacement control board listing for the 00-04500K. Check your existing board's printed part number, connector layout and fan configuration before ordering an electronic replacement.

For this model the listed keypad is 10-40005K. A 4501K keypad or a manual-lift 4002K circuit board is not automatically the correct part for a 4500K.

Roof lid and automatic-lift connections

Airxcel lists 12-00057 as the smoke MaxxFan Plus lid and 12-00056 as the white lid in the 4000K–4951K guide. They are not the same lid assembly used on the MaxxFan Deluxe. Before replacing a damaged lid, compare its hinge points and lift-arm connection as well as the model number. For the powered-lift section, the drawing identifies the 10-20222KS lift arm, 10-40007K rain sensor and 10-20270 lift motor.

Related parts diagrams

Have a manual-lift MAXXFAN instead? See the MAXXFAN Plus 00-04002K parts guide. The MAXXFAN Deluxe exploded parts guide covers a different vent family and lid design.

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