There are a few potential problems that could arise with a geothermal system. First, if the ground is too dry, it may not be able to absorb the fluid used in the system. This can cause the system to run inefficiently or stop working altogether. Additionally, if there is too much water in the ground, it can cause corrosion and damage to the system. Finally, if the ground is too hot or too cold, it may not be suitable for a geothermal system.