Water on the floor under a built-in refrigerator almost always comes from one of two places: a defrost drain that has frozen or clogged, or a water line feeding the dispenser and ice maker. Finding which one saves an unnecessary parts replacement.
Notes by Brand
The same symptom can point to different components depending on the manufacturer. Here is how it tends to present across the brands we service.
- Sub-Zero: A frozen defrost drain is the most common leak source on a Sub-Zero built-in; we clear the drain and fit a drain heater where the design allows.
- Viking: Viking units frequently leak from a clogged defrost drain that backs up into the fresh-food floor.
- Bosch: Bosch dishwashers, not refrigerators, are the more common leak source in a BSH kitchen; we confirm which appliance is leaking first.
- Miele: Miele refrigeration leaks usually trace to the drain or the water line, which we test before replacing valves.
- Liebherr: Liebherr integrated units can leak from the drain channel; we flush the channel and check the gasket.
- Sub-Zero (water line): On dispenser-equipped Sub-Zero units, a cracked inlet line or valve is the second leak source we check.
Symptom and Cause Guide
| Symptom | Likely Cause | What We Do |
|---|---|---|
| Water under drawers | Frozen defrost drain | Flush drain, add drain heater |
| Water at the base | Cracked water line or valve | Test line and valve, replace |
| Ice on freezer floor | Drain backed up and refroze | Clear and flush the drain |
| Leak at dispenser | Inlet valve or fitting | Tighten or replace fitting |
Wipe up standing water promptly and check the cabinet base, since built-in units sit tight against surrounding cabinetry and trapped water can damage the floor and case.
When to Book Service
If the symptom persists after basic checks, or if it involves the sealed system, gas, or standing water, book a diagnosis. We test the actual fault in a set order before quoting, so you are not paying to replace parts on a guess.
Dealing with this problem in Scituate or nearby? Book a diagnosis with a brand-focused tech.