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Your home’s HVAC system— heating, ventilation, and air conditioning— is like the respiratory system of your house. Not only does it impact your comfort levels, but it also plays an important role in your overall health and wellness. The very air you breathe is affected by your HVAC system.

When your HVAC starts to fail, it’s integral to have it replaced and updated as soon as possible. Here are five signs that it may be time for a new HVAC system.

Unexplained Power Bill Spikes

While utility costs are on the rise nationwide, there’s a difference between rate increases and power bill spikes. When your air conditioner or furnace starts to decline, they require more power to meet the same (or a diminished) output level. In other words, more energy to complete less work. According to Yeti AC Services San Antonio, it can be helpful to compare your power bill from the same season last year. If you notice a spike in consumption during the summer— beyond what’s expected when turning on your air conditioning— it’s time to call for an inspection. Conversely, if you notice the same issues during the colder months, your furnace is likely the culprit.

Temperature Inconsistencies

Another sign that your HVAC system is on the fritz is temperature inconsistencies. If you notice cold or hot spots or feel like the temperature displayed on the thermostat doesn’t match the air temperature, any part of your HVAC system could be failing. The problem may not be directly related to your furnace or AC but to the HVAC system as a whole. If the HVAC system isn’t working properly, airflow and humidity control may be affecting temperature control and perception. An HVAC specialist will be able to investigate and determine the cause.

Excess Condensation on Windows

Excess condensation on the windows is one of the most telling signs that your HVAC system is failing. Humidity control is an integral aspect of your overall heating, cooling, and ventilation. If your windows are dripping with water, there’s a serious issue. While broken window seals can also lead to this issue, it’s important to have an HVAC expert investigate. Excess humidity and poor moisture control can lead to the development of black mold and other health concerns.

Worsening Air Quality and Dust

One of the subtle signs that your HVAC system is failing is worsening air quality. What makes this issue so scary is that an increase in health issues is often the leading sign of a problem. If you notice that you aren’t feeling quite right or experience more stuffiness and colds than usual, you should have your air quality checked. Another sign that the ventilation is failing is increased dust around the house. Your HVAC filters are meant to capture and trap dust. A simple maintenance visit may be sufficient if you haven’t serviced your HVAC recently or haven’t changed the filters.

Rising Repair Costs

You can dramatically extend the lifespan of your home’s various systems with routine maintenance and repair visits. However, you’ll eventually reach a point of diminishing returns. When the service technician is at the house multiple times a year, it’s time to plan for a replacement. Keep in mind that most air conditioners and furnaces are meant to last 15 and 20 years, respectively. Even so, the technology of today is far more efficient than technology from over a decade ago. At some point, you’re doing yourself a disservice by pushing the lifespan limits. While maintenance and upkeep go a long way, replacements are inevitable. Keep an eye out for these telling signs that an HVAC replacement is on the horizon.