The short answer
A leak from the G family is almost always the defrost drain or the water supply, and telling them apart takes one observation: where the water is. On this platform the drain blocks before anything else does, which is why it leads this ranking.
What you observe
- Water pooling under the crisper drawers — The classic blocked defrost drain: melt water has nowhere to go and backs into the cabinet.
- A sheet of ice on the floor of the compartment — Same fault caught later, once the pooled water has frozen.
- Water on the floor at the front — The cabinet floor slopes forward, so a rear leak arrives at the front.
- Damp only at the back of the machine — Supply-side: the inlet connection or the line, and it will be wet when the unit is idle.
- NEAR MISS - condensation on the outside of the doors — That is humidity and seal performance, not a leak.
Causes, most likely first on G
- Blocked defrost drain — Ranked first on the G family: a tall cabinet has a long drain run with more places to block, and the pooling appears far from the blockage. The order below follows the air path rather than the refrigeration circuit, which is a family property and not a model one. What moves against the brand-generic order is lower down: door seals and condensation sits above drain pan cracked or displaced here, because this family is a single build with fixed access points.
- Water supply connection or line — Second: the supply connection is the one joint under constant pressure, so it weeps whether the appliance is running or not and the damage accrues quietly.
- Door seals and condensation — Third: a heavy built-in door can drop on its hinges and leave a corner gap that condenses continuously.
- Drain pan cracked or displaced — Fourth: the pan is under the housing and is rarely inspected, so an overflow shows as a floor leak with no visible source.
- Ice maker fill valve or its tubing — Last: last, and the valve sits at the back of the housing where the leak travels before it shows.
Check in this order, and why
- Empty the compartment and find the drain opening — It is the likeliest cause and it is visible once the shelves are out.
- Check the cabinet is level and tilted very slightly back — A cabinet leaning forward sends melt water towards the door instead of the drain.
- Pull the unit out and look at the connection and the pan — Do this with the cabinet idle: supply leaks are wet when nothing is running.
- Test the seals with a sheet of paper around each door — Last, because it explains condensation rather than standing water.
Before you open anything
Safety
Power off before opening anything, and clear ice by letting it melt. A blade against a cold surface punctures an evaporator and ends the appliance on the spot.
When to call a technician
Call when the drain keeps blocking after being cleared, because that usually means the drain heater or the defrost circuit is at fault rather than the channel itself.
Other G pages
SC
Sarah Chen
Lead Appliance Repair Technician · 12 years experience
EPA 608 UniversalNASTeC Certified
Experienced technician with 12 years specializing in washing machine and dryer repairs across all major brands.
