The answer to 'system upgrade leaking water' is that a leaking HVAC system after an upgrade can have several common causes, including improper installation, clogged condensate drains, and refrigerant line issues. Symptoms may include water pooling around the indoor unit, wet floors, or increased humidity. Solutions can involve tightening connections, clearing blockages, or adjusting refrigerant levels.
If the leak is minor, some DIY troubleshooting and repairs may be possible. However, for more complex issues or if the leak is significant, it's best to call a professional HVAC technician. They can properly diagnose the problem and make the necessary repairs to stop the leak and prevent further water damage.