Diagnosis
Leaks from the base are almost always from the filter housing O-rings. They can get pinched, dirty, or dry out and lose their seal.
How to Fix It
Turn off the water supply and unplug the unit. Unscrew each filter housing one by one. Inspect the black O-ring on the housing cap for nicks or debris. Clean it, apply a tiny bit of food-grade silicone grease (like Magic Lube), and reseat it carefully. Hand-tighten the housings—don't over-torque with a wrench.
If That Didn't Work
The leak might be from a cracked filter housing itself, which can happen if it was overtightened or frozen. Inspect the clear plastic for hairline cracks, especially around the threads.
Heads Up
If water is coming from the electrical area at the bottom, that's a major issue—likely a failed solenoid valve or a leak from the internal tubing. That's an immediate shut-off and a call to support.