MAXXFAN Plus 00-04002K: Roof Fan Parts & Exploded Diagram
The MAXXFAN Plus 00-04002K is a white, manually opened 12-volt roof fan with four fan speeds and selectable intake or exhaust. It fits an existing 14 × 14-inch RV roof opening. The manufacturer lists a different lid and control arrangement for other MAXXFAN and MAXXFAN Plus models, so identifying the full model number is the first step when replacing parts.
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14 × 14 inches, measured at the roof cutout.
Four fan speeds, intake and exhaust, manual lid crank; no remote.
2 to 6½ inches per the installation manual; thinner roofs need suitable additional framing.
12V DC with a minimum 5A fused circuit, following the maker's installation instructions.
Identify the manufacturer repair components
The numbered components below come from the MAXXAIR R-608H repair-parts sheet. Some parts are common across the MAXXFAN family, while the control electronics vary by model and production configuration.
| Factory drawing | Part number | Function and model detail |
|---|---|---|
| Complete white Plus lid | 12-00056 | White MAXXFAN Plus lid assembly; different from the standard MAXXFAN lid number. |
| Control plate / #1 | 05-20226K | Mounting plate for the control board and keypad. |
| Control board / #2M | 10B21274K | Printed circuit board specifically listed for manual model 4002K. |
| Manual knob shaft / #3M | 10-21232K | Manual-lift knob shaft for the 4000K–4401K family. |
| Manual knob / #4M | 05-21236K | Manual lid-opening knob. |
| Keypad / #5 | 10-21299K | Control keypad listed for 4000K, 4002K and 4050K. |
| Screen / #8 | 05-30925 | Removable round interior insect screen. |
| Fan blade / #9 | 10-20258KS | Fan blade shown for the MAXXFAN and MAXXFAN Plus repair family. |
| Fan motor / #14 | 10-20968 | Maker's fan motor used on applicable K-model units made after February 2012; match the existing motor and serial number. |
| Manual operator / #16M | 10A20281K-3CF | Manual lid-lifting mechanism for the 4000K–4401K models. |
Do not substitute the automatic-lift rain-sensor control board or lift motor for a manual-opening fan. Check the model and the serial-number label under the round interior screen when ordering electronic parts.
Manufacturer exploded drawings
MAXXAIR's original repair drawing shows the control plate and keypad on page 3 and the roof base, fan blade, motor and lift mechanism on page 4. The PDF below displays the factory illustration in-page where supported by your device.
MAXXFAN Plus control plate and keypad — drawing page 3
Open the original drawing in a separate PDF viewer — use this link if the embedded preview does not display on your phone.
For the fan motor, lift arm and blade positions, open the base assembly illustration (page 4). The separate MAXXFAN installation and operation manual covers wiring, roof sealing and lid operation.
Before replacing a component
- Disconnect 12V power before removing the screen or electrical parts. Do not operate the fan with the screen removed.
- Read the full MAXXFAN model and serial number before choosing a circuit board, motor or lid.
- For a broken dome, check the complete hinge and lift-arm engagement, not just the lid colour.
- Inspect the roof flange, gasket and sealant before reassembly and follow the original manufacturer installation instructions.
For a compact round exhaust fan rather than this 14-inch-square system, see the MAXXFAN Dome parts guide. For external rain covers, see the FanMate cover and hardware guide.
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