Comfort systems work hardest during extreme weather, and small issues can show up before a bigger breakdown happens. Weak airflow, uneven temperatures and higher energy use can point to filter problems, thermostat settings, duct concerns or equipment wear.(Image: http://a.rgbimg.com/cache1nETVk/users/s/su/sue_r_b/600/mhBHZXO.jpg) Planning HVAC services early can help avoid last minute disruptions.

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