Think of your HVAC unit like a car. It has a motor and runs off a certain type of energy. In the same way that you change your car's oil, spark plugs, recharge the battery, etc, these HVAC motors also need regular attention to run efficiently and effectively.
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Geothermal Heat Pumps
The nature of geothermal heat pumps is that they require very little maintenance, if any at all. Most of the system is buried outside underground in the form of pipes, which are built to last three decades or more. The system itself does have a fan to propel the warmed or cooled air into the home. This can be lubricated every few years if the bearing system isn't closed. Click here to read on about geothermal heating systems.
Most likely, if you own a geothermal heat pump you already understand the maintenance-free aspect of the system. If you feel that your system is not running as it should or that it might have some problems that you cannot address yourself, call a service professional out to examine the problem. Click this link to get matched to a prescreened HVAC contractor.