A leaking refrigerator water line needs three things right away: shut off the water, pull the fridge out, and dry the floor. The EPA says to dry water-damaged areas and items within 24 to 48 hours to prevent mold growth.
A slow drip behind the fridge is harder to catch. It can soak the subfloor for weeks before anyone pulls the fridge out.
Where does a refrigerator water line leak?
Most fridge water lines are thin tubes, about a quarter inch across, that feed the ice maker and the water dispenser. Check these spots:
- The connection at the back of the fridge. A fitting that was never tightened all the way can drip a little every day.
- The line itself. Pushing the fridge back against the wall can kink or crush a plastic line, and an old one can crack.
- The shutoff valve. It is often under the kitchen sink or in the basement ceiling below the fridge. Older saddle valves clamp onto a pipe and can weep where they pierce it.
- The water filter. A cracked filter housing, or a filter that is not seated right, can leak inside or under the fridge.
How can you tell a fridge leak has been going on for a while?
An old, slow leak rarely leaves a puddle, because the floor soaks up the water first. Look for these signs instead:
- Flooring near the fridge that feels soft or spongy when you step on it.
- Vinyl, laminate or wood floor edges that have lifted, swollen or turned dark.
- Dark spots on the cabinet toe kick or the baseboard next to the fridge.
- A musty smell when you pull the fridge out.
- A stain on the basement ceiling right under the kitchen.
How fast can mold grow after a fridge leak?
The EPA tells homeowners to dry water-damaged areas and items within 24 to 48 hours to prevent mold growth. A fridge leak often misses that window by weeks, because it drips where nobody looks.
By the time the floor feels soft, the subfloor under the vinyl or wood may be wet all the way through. Subfloor is usually plywood or particle board, and both soak up water fast and dry out slowly.
What should you do right now?
- Shut off the water. Close the valve on the fridge line. If you cannot find it, close the main water shutoff for the house.
- Unplug the fridge and pull it out. Take photos of the floor, the wall and the line before you clean anything.
- Dry everything you can reach. Use towels first, then fans. Leave the fridge pulled out so air gets to the floor.
- Check below. If the kitchen is over a basement or crawl space, look at the ceiling and the joists under the fridge.
- Get the line fixed. A plumber can replace the line and the valve. Ask about a braided stainless steel line while you are at it.
- Wait before you cover it up. Let the subfloor dry out before new flooring or the fridge goes back in place.
What does a fridge leak look like in a Colorado home?
When the kitchen is over a basement, a slow fridge leak often shows up downstairs first. You notice a stain on the basement ceiling before you notice anything in the kitchen.
Our team saw how far one of these can go in a Fort Collins rental. A flooring contractor found mold on the subfloor under the refrigerator, from a leak that had gone on for a long time.
You can read the full story of that Fort Collins subfloor job. The damaged sections of subfloor had to come out before the flooring repair could go ahead.
When should you call for help?
Get help if you see any of these:
- Mold on the subfloor, the cabinet base or the drywall behind the fridge.
- A soft or sagging spot in the kitchen floor.
- A patch bigger than about 10 square feet, the size the EPA gives for most do-it-yourself cleanups.
- A musty smell that comes back after everything is dry.
Wet subfloor and flooring sometimes have to come out. The EPA notes that absorbent materials may have to be replaced once they grow mold.
Send us photos of the floor and the space behind the fridge. We send back a number, usually the same business day. Our kitchen mold removal page covers the leaks we see most in Colorado kitchens and what to send us.
Call (720) 443-4222 in the Denver area or (970) 469-9030 in Northern Colorado.