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A Ductless Heating Unit on the Wall Is Sagging—What’s Wrong?

ductless-mini-split-on-wallDuctless heating and cooling systems grow in popularity with each year. For new home construction, going with a ductless mini split heat pump is a great way to have more design freedom. There are many other benefits of using ductless heating, such as overall cost savings, improvements in indoor air quality, and the ease of repairs.

Speaking of repairs, if your home is equipped with a ductless heating and cooling system, you may need to have professionals fix problems on occasion. The best ductless mini splits should rarely run into malfunctions, but there are a few specific troubles that can affect them. One of them is when an indoor air handler—the basic units that send heated and cooled air into a room—appears to be sagging on the wall. What’s going on, and how urgent is the problem?

Yes, something is wrong—and it needs a professional fix right away!

The most likely reason you’re seeing a sagging wall unit is because there’s a leak in the condensation line. Each indoor air handler in a ductless mini split system has a condensate line that passes through the back of the unit and through a 3” hole drilled in the wall. If the line starts to come loose, it will leak water out between the unit and the wall. Water quickly deteriorates drywall as it creates mildew, and the weakening of the wall material leads to the air handler starting to droop from its mount. Eventually, the unit will fall, probably ripping away a portion of the drywall with it. Obviously, this isn’t something you want to happen.

Another possibility is the wall unit was poorly installed. The mount may have been hastily attached to the wall and isn’t secure enough to support the weight of the unit. This is one of the dangers of having a non-professional do the installation, or if you attempted to go DIY with the work. You may have heard that ductless systems are “easy to install,” but that means easy to install for professionals, who can have the work done fast. Attempting this on your own—or giving it to amateurs—can mean bad news with future troubles like a wall unit tumbling off the wall!

Good news: these repairs are simple for professionals

A great edge ductless mini splits have over standard central heat pumps is that if something goes wrong with one indoor unit, it’s an easy repair for an expert, and it won’t affect the rest of the system while the work is done. The technician can even swap out a bad air handler unit for a new one, easy!

If you’re looking for solutions to problems with your ductless heating in Eugene, OR, we’re the contractors to call. Along with repair work, we install top-of-the-line Mitsubishi ductless mini splits, such as the MXZ–8B48NA, which is rated for up to 8 indoor units, and the MXZ–4B36NA, which is rated for 4 indoor units. The flexibility of the Mitsubishi models makes them ideal for all sizes of homes and household needs.

Comfort Flow Heating serves all of Oregon. We have 24-hour emergency service available.

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