Diagnosis
The condensate pump has failed or is air-locked. These small internal pumps can clog with algae/slime or the impeller can seize.
How to Fix It
First, check the basics. Is the drain hose kinked or clogged? Disconnect it from the pump outlet and blow through it. Is the hose running uphill? The pump can only lift water so high (check for the specific head height, but it's usually around 15-20 feet). Next, unplug the unit. The pump is inside, at the bottom where the bucket sits. You can usually access it by removing the bucket and reaching in. There's a small filter screen on the pump intake—clean it. Then, try to manually trigger the pump's float switch (or put a cup of water directly into the pump basin) to see if it kicks on.
If That Didn't Work
The pump motor itself is likely dead. You can order a replacement condensate pump assembly. It's a generic style used in many dehumidifiers, not a proprietary Santa Fe part.
Heads Up
If you're using a long drain hose, make sure it's the recommended diameter (usually 1/2" ID) and that it has a consistent downward slope after the initial lift. Any dips can create air locks that stop the flow.