Why Is My Wash Machine Flooding When On Hot Water? 5 Causes and Solutions

Why is my wash machine flooding when on hot water? Regardless of the type of washing machine you have, this problem can pop up when you least expect it. Sometimes, there’s a simple fix, while other times, repair work is necessary. Here's how to know when to call a pro for help. 

1. Blocked Drain

Often, the source of the problem is an issue with the drain and not necessarily the wash machine itself. Whether your washer drains into a basin, sink, floor drain, or wall drain, if debris clogs the discharge water's route to your home's sewer system, flooding is the normal result. 

The Solution

The solution for a blocked drain depends on how your washing machine drains. If it drains into a sink or basin, you can often identify the clog as an obstruction at the sink's drain. Simply removing the blockage—laundry lint or a foreign object are common culprits—is usually enough to get water flowing freely again. 

If the drain clog is in a floor or wall drain, you'll likely need a plumbing snake to remedy the issue. Many homeowners skip the DIY on this one and call a local drain cleaning service to handle the situation. 

2. Leaking Hose Connection

Your washing machine connects to your home's plumbing supply through flexible hoses. These hoses don't last forever and can get loose over time. This can cause dripping or outright flooding. Because hot water is more corrosive than cold, flooding from the hot water hose connection is more common than flooding from the cold side. 

The Solution

If your washing machine is brand new and you experience a flooding situation, the first thing to check is the hose installation. Improper installation or tightening is a common cause. This is also the first place to check if your water connection hoses are older than five years. 

Check the rear of the machine and the location where the hoses meet your home's plumbing for signs of leaks or drips. Tightening or replacing the hoses is a relatively simple DIY project, or you can contact a pro for their replacement. 

3. Overloaded Machine

Putting too many articles of clothing or overly bulky items in your washing machine can cause a couple of different problems. While shaking or vibrating is one concern, the bigger problem is the potential for blocking the internal drain. When your machine tries to drain the wash or rinse water, it has no place to go. 

The Solution

The easy answer to this problem is to wash fewer clothes at one time. However, that's not always practical when it comes to bulky items that need cleaning. The best way to wash the items is to balance or spread out the load as evenly as possible. Then, monitor the machine during the draining cycles to catch any problems before the floor gets wet. 

4. Door Seal Damage

A common problem with front load washers versus top load ones happens at the door of the appliance. Because water is in direct contact with the door of front loading machines, if the door seal fails, deteriorates, or is out of alignment with the machine's body, flooding can happen. 

The Solution

If you have a front loading washing machine, make inspecting the door seal part of your laundry routine. Take a quick look to see that everything looks normal before washing a load. If you experience a flooding situation from a failed door seal, replacing the part is really the only way to fix it. 

5. Mechanical Failure

Washing machines are far more complex than the corrugated washboards of a hundred years ago. With so many moving and electronic washing machine parts to keep in good working order, it's no surprise that a failure in one of the water-managing components can cause flooding.

The Solution

Failed parts or mechanical failure usually require professional repair, especially on modern units. In a flooding situation, the water sensor, drain pump, inlet valve, or motherboard could be to blame. Washing machine repairs cost between $125 and $450 on average, which is far less costly than repairing significant water damage. 

When to Call a Pro

DIY washing machine repair is possible, especially if the flooding problem stems from a blocked sink drain or leaky connection hoses. However, fixing more complex problems in modern appliances requires specialized knowledge and, sometimes, special tools. In these cases, most homeowners simply call a local washing machine repair specialist to tackle the issue.