The Maxx Fans are designed for moving air in and out of the camper. This is particularly useful for reducing condensation and also removing hot air during cooking etc.
The OEM fans are the Maxx Air Pro which include 10 speed settings, a fixed thermostat setting (fan is on full until temperature reached) and a reverse button to move the fan mode from intake to exhaust.
Changes in atmospheric conditions can cause the fan to squeal. The bearings are sealed and can not be oiled. I have had some luck with reseating the bearings by running the fan on full speed for 20 minutes or so.
Speed Control Buttons Fail
The fans are held in place by some self tapping screws on the roof. They go through the fan surround, through a piece of thick foam and tap into the roof of the camper. These screws are prone to loosening. Reducing the pressure, and therefore density, of the foam, which then allows water ingress during rain.
A simple tighten of the screws fixes this issue. Do not overtighten; just tighten to the point of mild plasticity. This should stop the leak.
Serial Number Stickers
The serial numbers are the same on both stickers. Worth making a note of them as cleaning and atmospeheric conditions can cause them to come off. This happened to me so I used the serial number from the other vent to get a circuit board warranty replaced.
Remove the grill by rotating the white tabs and clean. I blasted most of the fluff off with my compressor and used a damp cloth for the rest.
To clean the fan blades I found it easier to just use a small hex key on the screw in the centre spindle. The blade unit just drops down. Remove the blades, clean with soap and water and replace.
The steel apparatus that raises the plastic lid are prone to rusting in coastal / salty areas. I would recommend a wipe down with silicone spray prior to and bi-weekly when in salty areas.
- Remove the mesh grill by turning the plastic pillars
- Remove the blade by unscrewing the hex bolt in the metal centre pillar.
- To remove the interior unit, undo 4 x Philips screws and also the Philips screw inside the black handle you turn to open the vent.
- After the above are remove the interior unit should drop down. Undo the + and – wiring connectors to remove the unit.
- To remove the upper unit, first remove the interior unit, then head up onto the roof and remove the self tapping screws. The upper unit should lift out.