Moisture is typically the culprit when you find mould growth in the AC closet. In damp, moist conditions, mould can spread quite rapidly from one location to another. Checking the unit and drying out the room regularly are the best ways to prevent mould from spreading to the rest of the home. Understanding more about mould and how the AC unit works can help you prevent mould from spreading and provide insight into the best ways to remove mould that’s already spread throughout the house.

Excess drainage can overflow

When the AC is functioning properly, the evaporator coil inside your unit should help dehumidify and reduce moisture inside the home as warm air passes through and around it. The evaporator coil struggles to remove warm air when there is excessive heat inside the home. This leads to moisture accumulating on the coil and excess water dripping down to the drainage pan below. If there is too much water for the drainage line, the excess can overflow and spill out of the drainage pan.

Perform basic maintenance

The overflow creates a damp, moist environment in a dark closet that allows airborne mould spores to thrive and spread throughout the home. The first step in preventing mould from spreading all over the house is performing basic maintenance checks on the AC unit. Remove the drainage pan and empty out the excess water. Removing the cover to expose the coil and inspect for damage. After checking the unit, the floorboards and walls in the closet should be dry and show no signs of discolouration.

Might need a restoration professional

Once all the exposed surfaces are assessed, use a few fans to help the walls and floor dry off quickly. Point the fans at the floor first for approximately a half-hour, then pivot them to the walls. Investing in a dehumidifier can also help you with minimizing the risk of mould growth spreading from the closet to the rest of the house. If the level of condensation and mould growth cannot be conquered, a restoration professional is advised.

Mould spores begin growing

Within 48 hours of contact, mould spores begin growing on organic materials like soap scum, drywall, dirt, paper, and food, among others. Mould growth is strongest when the temperature inside ranges from 60 to 80 degrees. It’s also worth noting that airborne mould spores are easily attached to clothes and carpeting. If mould growth is found in different places throughout the home, you may need to remove all the carpeting as well.

Mould thrives in AC closets

AC closets are ideal for mould growth because the spores thrive in warm, wet, dark places. Leaking water pipes can also contribute to mould growth in your home. Poor ventilation and humidity levels above 60 percent may also spur mould growth in different places inside. Clutter and piles of damp clothes are often overlooked sources of mould growth as well. To find the true cause and solution to mould growth inside your home, don’t hesitate to contact a restoration professional for assistance.