01Frost and Ice
Meltwater Running Down the Inside Wall
Check these before you call anyone
- 01
Trace the stripe upwards with a torch. One that begins at the seam under the rear panel is defrost water; one starting higher has another source.
- 02
Look for glaze on the panel above where the stripe starts. Water and ice together in that spot say the coil is shedding more than the trough can take.
- 03
Move anything resting against the rear panel. A carton touching it bridges the gap and carries water forward onto the liner as the cycle finishes.
- 04
If the cabinet makes ice, watch one fill. Water arriving past the module rather than into it explains a stripe the defrost never could.
If none of that is it, stop there — the next step needs a meter. Sub-Zero Repair Experts Los Angeles, (310) 496-3358.
What sends the water forward
A defrost only works if everything it melts goes backwards and down. The trough behind the coil is narrow and has one job: catch the water in the seconds before the compartment freezes it again.
Three things spoil that. Ice already standing at one end of the trough turns it into a dam, so the overflow goes over the front lip. A cabinet leaning forward tips the same water the wrong way. And a blocked outlet fills the trough from the far end until it spills back towards you. In each case the defrost is working — the drainage is not.
What it turns into if it is left
The stripe is the polite stage. Left alone, the water freezes where it lands, and the ridge it builds widens each cycle until it reaches the floor, the lowest basket or the seal at the bottom of the door. A seal held open by ice then lets room air in, which makes more frost, which the defrost has to melt, which sends more water down the same route.
That loop is why a wet liner is worth a call while it is still only wet: the repair is a trough, an outlet and a level check. Two months later it is a full thaw as well.
If it is not that
When the trough itself has iced at one end, the part that should be keeping it clear is priced onthe defrost heater page.
Follow the stripe to the bottom and you often find the second half of the story onan ice slab on the freezer floor.
Tracing where a cycle is losing its water takes a panel off, which isfreezer work rather than a kitchen job.
Follow-ups
Why is the water freezing halfway down the wall?
Because the liner it is crossing is far below freezing. Water that leaves the trough has seconds before it sets, so you get a frozen ribbon rather than a puddle, and the ribbon narrows the route for whatever the next cycle releases. The pattern grows on itself week by week.
Can a cabinet sitting out of level cause this?
It can. A trough is shallow by design and relies on the cabinet standing true, so a front that has settled forward tips water towards the compartment instead of the outlet. Checking that is part of the visit, and worth mentioning when you ring Sub-Zero Repair Experts Los Angeles on (310) 496-3358.
Sub-Zero Repair Experts Los Angeles works on Sub-Zero freezers across the east side and the south valley. (310) 496-3358 — answered 24/7, on-site 8:00 am – 8:00 pm, seven days, $89 for the visit and the diagnosis.