Why Is There Brown Liquid Dripping from My Bathroom Exhaust Fan?

Experiencing brown liquid dripping from your bathroom exhaust fan can be concerning and may indicate a few potential issues. Below, we discuss the causes and provide recommendations on how to address this problem.

Causes of Brown Liquid Dripping

Condensation

If the fan is not properly vented to the outside, moisture from the bathroom can accumulate and condense within the ductwork. This can lead to water pooling and eventually dripping. If the water contains dust or dirt, it may appear brown. Proper ventilation and regular maintenance can help prevent this issue.

Water Damage

There could be a leak in the roof or plumbing above the bathroom. Water from these sources can travel down into the fan housing, especially if there are any gaps or cracks. Addressing any roof or plumbing leaks is crucial to prevent water damage.

Mold or Mildew

The brown liquid could be a sign of mold or mildew growth. If the area has been damp for an extended period, it can create a brownish liquid that may drip from the fan. This is a serious issue that can affect your home's air quality and your health. It's important to identify and eliminate the source of moisture to stop the growth.

Debris Buildup

If the fan has not been cleaned regularly, debris and dust may accumulate. When moisture combines with this buildup, it can create a brown liquid. Regular cleaning of the fan and ductwork can prevent this from happening.

Recommendations

To address the issue of brown liquid dripping from your bathroom exhaust fan, follow these recommendations:

Turn Off the Fan: Immediately turn off the fan to avoid further damage or potential electrical issues. Inspect the Area: Check for any visible leaks, mold, or water damage. Look for any gaps or cracks in the ductwork and the fan housing. Clean the Fan: If it's safe to do so, clean the fan and ductwork to remove any buildup. Use a vacuum cleaner or a damp cloth to clean the exterior and interior of the fan and ducts. Call a Professional: If you cannot determine the source of the brown liquid or if it appears to be a more serious issue, consider contacting a plumber or HVAC professional for a thorough inspection and repair.

Personal Experience

Previously, in the winter, our fan would take water up and over to a vent under the eaves of our roof. The steam/moisture would condensate and sit in the vent hose. If enough water got trapped in the hose, it could flow back to the exhaust fan and start dripping. We had to suspend our vent hose to prevent this issue and ensure proper drainage.

That can be caused by a lot of humid air sucking through there. Now there's enough moisture in it to drip down from the tinwater. It might be due to multiple reasons, none of which are good. Something is leaking. Do you own the unit or whatever is on the floor above? It could be either a room or the roof. I would start taking things apart to find the leak.

Addressing these issues promptly can help prevent further damage and ensure the health and safety of your home. Regular maintenance, careful inspection, and professional help when necessary can go a long way in keeping your bathroom exhaust fan functioning properly.