Common problems

Why is there water on the floor under my refrigerator?

Short answer

Water on the floor under a refrigerator comes from one of two places, and both are inexpensive repairs made expensive by waiting.

The first is the defrost drain: every fridge melts frost off its evaporator on a cycle and routes the water to a tray to evaporate, and when that drain ices closed the water overflows inside the cabinet and runs out under the door. The second is the water line to the ice maker or dispenser, which splits at the fitting or the valve. On a built-in installed over hardwood or stone, the flooring damage will exceed the repair within days, so this is the fault least worth living with.

Refrigeration gauges connected through the opened top grille of a panelled built-in refrigerator during a sealed-system diagnosis
Refrigeration gauges connected through the opened top grille of a panelled built-in refrigerator during a sealed-system diagnosis

Diagnosis

What it usually turns out to be

Listed roughly in the order a technician checks them — which is not the order of how expensive they are, but of how likely.

Most common

Defrost drain iced or blocked

Melt-water cannot reach the evaporation tray, so it backs up, freezes, and eventually runs out of the cabinet. Usually accompanied by ice on the freezer floor.

Most common

Split or loose ice-maker line

The plastic supply line or its compression fitting fails, usually at a bend or behind the unit. This one does not stop on its own.

Common

Cracked or overflowing drain pan

The tray that catches the melt-water has cracked, or is being overfilled because the unit is running a longer defrost than it should.

Common

Door seal letting warm air in

Warm humid air entering the cabinet condenses, and the extra water overwhelms a drain that would otherwise cope.

Less common

Water filter head or valve seeping

A filter housing that has not been seated properly after a change, or an inlet valve weeping past its seat.

When to stop and call

Shut the water off to the unit if you can, and call. On stone or hardwood this is the one appliance fault where a day of waiting can cost more than the appliance.

Before you call

What you can safely check yourself

  • Work out whether the water is clean or has been standing — clean water points at the supply line, cloudy at the drain.
  • Open the freezer and look at the floor of the compartment. Ice there is the signature of a blocked defrost drain.
  • If you can safely reach the shut-off valve for the fridge water line, close it. If the leak stops within an hour, it is the supply, not the drain.
  • Check the door seals with the banknote test — a leaking seal makes every other water problem worse.
  • Put a towel down and take a photo of where the water actually emerges. It saves diagnostic time and we will ask.

Nothing above asks you to open a sealed system, meter a live board or bypass a safety device. If a step needs any of those, it is not on this list.

More on this

Can I just keep mopping it up?

You can, and the drain will keep icing and the line will keep splitting. Neither fault self-corrects, and the floor underneath is absorbing water the whole time.

Is a blocked drain expensive to fix?

It is one of the least expensive repairs we do. Clearing the drain and correcting whatever iced it is usually a single short visit.

Reviews

What Our Customers Say

Real reviews from real customers across San Diego and Orange County.

Sharon M.
January 2026
★★★★★

He was at my house in less than 30 minutes. He quickly diagnosed the issue and ordered the part. My machine was up and running in 2 days when I had anticipated a 1-2 week wait. I can’t recommend him enough!

Lauren T.
January 2026
★★★★★

Vlad solved an issue with our fridge that we have had ever since we bought it. No one else had been able to figure it out — zero water pressure from fridge as well as a broken ice machine. Would call him again for any future appliance fixes!

Ryan N.
January 2026
★★★★★

Vlad is a fantastic repair man. I thought I was going to have to buy a new washer unit. He showed up on time the next day and within 1 minute had diagnosed the problem. In and out and the washer is working great again!

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