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Winter Humidity Issues and Your HVAC System

October 23, 2025
winter humidity issues

Although Los Angeles can be considered to have a dry climate most of the year, during wintertime your home can be susceptible to winter humidity issues. This can lead to water damage from excess humidity or other moisture issues during the winter. Winter humidity issues can also impact your HVAC system. Routine maintenance is essential for your HVAC system in keeping it working properly and efficiently as long as possible. It is important to keep an eye out for any excess moisture issues in your home to help avoid potential costly damage to your HVAC system and to minimize mold/rot issues. In this article we discuss ways that winter humidity issues and your HVAC system could interact and ways you can help minimize any damage.

Excess Humidity

Have you noticed excess dampness or water dripping in your home recently? With the recent temperature fluctuations, it is likely due to excess humidity in your home which is the water vapor present in the air. Aside from the weather, there are several other contributing factors that can add moisture to the air and if there is poor circulation the moisture cannot get out. Indoor activities such as showering, or cooking can increase humidity levels. Furthermore, condensation on your windows for example is possible if there is a large amount of humidity in the air. Condensation can become an issue in the ducts if the ducting is not properly insulated. Also, the condensation can result in water dripping causing further damage or providing a source allowing for mold growth or pests. However, keep in mind that humidity can become an HVAC issue if the levels get too high or too low.

Furnace Leak

If you notice any water leaking from your furnace call for repair as soon as you notice any water to prevent any major water damage. Some issues that can lead to water leaking from your furnace is a clogged condensate drain line or a faulty condensate pump.  

Roof Leaks

Your HVAC system is responsible for letting fresh air in from outdoors. Vent exhaust pipes or roof leaks near flashing can sometimes result in a water leak indoors. If it is raining and the weather is bad enough, it will not be safe for technicians to work on the outdoor unit especially if it is located on the roof. Call and check first, but it is possible the weather will have to clear up first before a site visit is scheduled for repair to be completed.

What Can I Do to Reduce Moisture?

While winter humidity issues can be cause for concern, there are steps you can take to gain control of the humidity levels in your home. The key to minimize humidity issues is to improve indoor ventilation and have continuous air exchange and movement throughout your home. One simple way to do this is to open all bedroom and bathroom doors to ensure proper air circulation throughout the home. Furthermore, running your fan can help circulate fresh air between rooms. It is also important to keep all vents open and ensure they are not blocked by any furniture. Before you cook or shower, turn on the exhaust fans so any excess moisture can quickly be pushed out of the home.

Contact LA Construction, Heating and Air

The winter humidity issues discussed can lead to problems with your HVAC system. Whether you need to schedule routine maintenance or HVAC repair we are here to help you keep your system running properly and efficiently. Give us a call today at 818-341-3406 or contact us online.

Winter Humidity Issues and Your HVAC System

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