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HVAC systems are complicated networks of machinery that should be serviced by a certified professional. However, if your HVAC system seems to be malfunctioning, you can try a few basic steps, which may correct your problem, prior to calling a service professional. If you do not feel comfortable performing any of these tasks, however, do not hesitate to contact us.
Disconnect and reconnect your indoor and outdoor switches.
Make sure your circuit breakers are in the ON position.
Make sure your filters are clean.
Open supply and return vents and make sure they are unobstructed.
Check the settings on your thermostat.
Make sure the system switch is on the appropriate COOL or HEAT setting.