How to Clean an RV Vent Fan to Keep You Cool & Prevent Moisture Buildup

Knowing how to clean an RV vent fan is more important than you may think. This maintenance task doesn’t need to be done often, but if you don’t do it at all, you’re missing out on the benefits of your vent fan, one of the most-used devices on many RVs. We’re not talking about a regular dusting, though. We’re talking about a good deep cleaning so that you can continue to reap the benefits of your RV’s vent fan and its intended job: keeping you cooler and preventing moisture build-up in your rig.

Our motorhome had two Fantastic vent fans, so this post will show us cleaning that brand. Although your vent fan(s) may be a different brand, the basic steps for deep cleaning the fan should remain the same. So, in this post, we’ll demonstrate how to remove, clean, and reinstall an RV’s Fantastic vent fan.

What Is an RV Vent Fan?

Most RVs have at least one vent fan. The primary purpose of a vent fan is twofold (though there are a lot of reasons proper ventilation is important in your RV):

• First, your RV’s vent fan is designed to circulate fresh air throughout the RV, helping to keep you cool inside the rig when the weather outside is warm.
• The second purpose is to keep moisture from accumulating in your RV. Showering, cooking, and even breathing produce moisture, which, as you may know, is an enemy of RVs. Not only can it lead to mold and mildew in an RV, but it can also eventually cause a breakdown of the materials used to build the rig. Moisture can cause significant damage over time.

So, having an exhaust fan in your motorhome, travel trailer, truck camper, van conversion, or fifth wheel is terrific for reducing summer air conditioning use and removing moisture from the camper in all seasons.

As we noted, we had Fantastic brand fans in our motorhome. Your rig may have a MaxxAir fan or maybe some other brand of RV vent fan. Either way, the steps to clean them should be pretty similar. Some vent fans may allow you complete access from inside the RV. In fact, you may be able to clean the fan blades fairly well from right inside the RV with a little finesse. However, most vent fans we’ve seen require heading up to the roof to get them completely clean.

How to Clean an RV Vent Fan

RV vent fans are used frequently and move a significant amount of air, which can cause them to become extremely dirty. So we thoroughly clean ours ate least once or twice a year. Removing and replacing the fans to give them a really good cleaning requires no special tools or knowledge and can easily be completed in half an hour or less with the following steps:

Remove the Inside Screen

In most rigs, removing the interior screen of a vent fan involves removing some screws around the perimeter of the frame. We upgraded our fans with Fantastic Pop ‘N Lock screens shortly after we bought our rig. They make it easy to simply pop the screens out for regular cleaning without needing to unscrew anything, and we absolutely love them.

Fan-Tastic Vent K2035-81 Pop 'N Lock Screen - White

• No assembly
• Covers existing screw holes

$41.36

Buy on Amazon Price & availability info updated 2026-01-17 at 16:20.

Remove the Vent Cover

Next, we head up to the roof to remove the exterior vent cover. MaxxAir vent covers are probably the brand most commonly seen on RVs, but we found a different one that we prefer — Camco Aero-Flo roof vent covers.

First, these vent covers provide easy access to the fans. Simply loosen a couple of Phillips-head screws, lift the top right off, and you’re in and ready to start cleaning. We’ve also found that Aero-Flo vent covers allow for excellent air distribution due to their large front louvers. They offer approximately 30% more open vent area than other brands on the market, and they’re low profile so they don’t create as much drag or noise.

Sale

Camco 40421 Aero-Flo Roof Vent Cover (White)

• Offers 30 percent more open vent area than other brands
• Mounting hardware included; Mounts to existing 14” x 14” roof vents

−$3.02 $49.97

Buy on Amazon Price & availability info updated 2026-01-16 at 22:44.

Remove the Bracket from the Fan Lid

With the fan fully open, use a Phillips screwdriver to loosen (but don’t remove) the screw at the lower end of the support bracket. Then remove the screw at the top of the bracket. This will allow the lid to open more fully for better access.

Use a Phillips screwdriver to loosen the bottom screw and remove the top screw from the bracket. This allows better access to the fan and keeps the lid out of the way during cleaning.

Lift the Lid Up And Re-Tighten the Lower Screw

Lift the fan lid up and out of the way as far as it will go. Then snug the lower screw back into place to hold the lid open. This will keep it as far out of your way as possible, allowing better access to the fan during cleaning.

Remove Fan Screws

Remove the four Phillips head screws that hold the fan in place.

Remove the four Phillips screws that hold the fan into the housing.

Disconnect Power Wires

Disconnect the wires that power the fan. There may be one or two plastic clips that hold the wires to a track in the fan. Simply remove it (or them), then disconnect the wires by separating the plug connectors, noting which wire is positive (usually red) and which is negative (usually black or white).

NOTE: Some fans may have been installed at the factory without plug-in connectors in the wires. In that case, you can either cut the wires and install connectors yourself or complete the cleaning process using as much slack in the wires as you have available (which makes it a little more awkward, but not impossible).

Remove the small retaining clip holding the wires in the track. Then pull apart the two power plugs, noting which wire is positive and which is negative.

Remove the Fan

Remove the fan by tilting it and lifting it up and out of the opening. It may take a little wiggling, as the fan blades are just about the same size as the opening.

Clean the Area Surrounding the Fan

Use a damp rag to clean out the inside of the lid and the inside of the fan casing. Note that this step would be impossible to perform if the fan were to remain in place during the deep cleaning process.

Disconnect the Fan Blades from the Motor

Looking between the fan blades and the motor, you’ll see a small Allen nut that secures them together. Use a 3/32″ Allen wrench to loosen (but not remove) the Allen nut, then slide the fan blades off the post. Unless you have a very long Allen wrench, you’ll probably need to use a pair of pliers to loosen the Allen nut. You should now be able to separate the fan blades from the motor easily.

You’ll need a 3/32 Allen wrench to loosen the nut that holds the fan blades and motor together.

Thoroughly Clean the Fan Blades and Motor Assembly

Use a damp cloth to clean the fan blades and the motor assembly thoroughly. We often hand the fan blades down from the roof to clean them in the kitchen sink. Along with the screen, that’s the part of the entire fan assembly that gets the dirtiest by far.

Clean the Vent Fan Screen

Wash (using dish soap) and rinse the vent fan screen thoroughly so that all of the dirt, dust, pollen, etc, have been removed.

Put the Fan Blades and Motor Back Together

Reconnect the fan blades and the motor assembly, using your Allen wrench and pliers to tighten the nut snugly. Be sure to install the blades in the same location on the post (not too close, or far from, the motor assembly).

Replace the Fan and Reconnect the Power Wires

Tilting the fan at an angle, set it back into the vent fan hole until it’s properly seated. Again, it will be tight, so it may require some gentle wiggling to fit into place. Be sure not to force it. Replace the four screws that hold the fan in place. Reconnect the power plugs and replace the plastic clip that holds the wires in the track. Be sure to reconnect the power plugs to the correct wires (negative/positive).

Reattach the Screw that Holds the Lid in Place

Loosen the Phillips screw on the back of the bracket that you tightened to hold the lid up during cleaning. Lower the lid enough to align the upper hole with the bracket. Then, reattach the screw at the top of the bracket and tighten both screws.

Close the Lid and Replace the Vent Fan Cover

Close the fan lid and then replace the top of the vent fan cover. If you have the same Camco Aero-Flo fan cover we do, that simply requires aligning the hinges and tightening the two Phillips screws.

Replace the Interior Screen

Replace the now-clean screen on the interior of the vent fan.

That’s how you super clean one of the dirtiest parts of your RV in less than 30 minutes. If it’s been a while since you last cleaned your fans, you’ll immediately be amazed at the difference, with so much more light coming in!

If you’d like to watch this DIY project being done, check out our video and follow Peter as he thoroughly cleans our RV vent fans.

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