How do I fix Bosch Dishwasher Drain Hose Replacement - Signs & How-To?

Work through the step-by-step fix below. Start with the quick reset and the most common cause, then check the specific part this guide points to. Most fixes need only basic hand tools and the right replacement part.

Can I keep using my Bosch appliance with this error showing?

Usually not. Bosch appliances show this error when a part or safety circuit is out of range, so running it can stop the cycle or make the problem worse. Diagnose and clear the error before normal use.

What part is most commonly replaced for Bosch Dishwasher Drain Hose Replacement - Signs & How-To?

The parts that most often fix Bosch Dishwasher Drain Hose Replacement - Signs & How-To are listed in the parts section of this guide. Match the part to your exact model and serial number before you buy.

Is Bosch Dishwasher Drain Hose Replacement - Signs & How-To a DIY repair or do I need a technician?

Many fixes are DIY-friendly with basic tools, such as door switches, drain pumps, water inlet valves, thermostats, heating elements, and filters. Sealed-system, refrigerant, gas, or high-voltage work should go to a licensed technician for safety.

Bosch Dishwasher Drain Hose Replacement - Signs & How-To

Q: What does Bosch Dishwasher Drain Hose Replacement - Signs & How-To mean?

Kinked, blocked, or leaking drain hose causes standing water and E24/E25 errors. Replacing the damaged hose restores proper drainage.

Bosch Dishwasher Drain Hose Replacement — What This Part Does

The drain hose carries wastewater from the dishwasher pump to your sink drain, garbage disposal, or standpipe. On Bosch dishwashers, the hose is a passive rubber or corrugated plastic tube that relies on the drain pump to push water through. When the hose becomes kinked, crushed, twisted, internally blocked, or develops cracks and leaks, the dishwasher cannot empty properly and may trigger E24 or E25 drain faults.

Most Bosch drain issues stem from a clogged filter, loose pump cover, blocked pump impeller, or a missing knockout plug on a new garbage disposal rather than the hose itself. The hose only needs replacement when physical inspection reveals damage, an internal collapse, a persistent blockage that cannot be cleared, or visible leaks. Replacing a worn or damaged drain hose restores unrestricted flow and prevents water from backing up into the tub or leaking onto the floor.

Jump to Replacement Steps

Signs It Needs Replacing

Standing water remains in the tub after a cycle The dishwasher fails to empty completely, leaving dirty water pooling at the bottom.
E24 or E25 error code appears on the display Bosch displays a drain fault code, indicating the unit is not draining properly.
Water leaks from under the dishwasher or around the hose connection Cracks, splits, or loose clamps in the drain hose allow water to escape during the drain cycle.
Drain cycle runs longer than normal or sounds strained A kinked or partially blocked hose forces the pump to work harder and run longer without clearing the water.
Visible kinks, twists, or crush damage on the hose behind the unit Physical inspection reveals the hose has been pinched, bent sharply, or flattened during installation or moving.
Foul odor or slow draining even after cleaning the filter and pump An internal blockage or bacterial buildup inside the hose restricts flow and causes smells that filter cleaning does not resolve.

How to Replace It

Shut off power to the dishwasher at the circuit breaker and turn off the water supply valve under the sink.
Remove the lower dish rack and unscrew the cylindrical filter assembly from the tub floor, then lift out the pump cover underneath and check for debris or improper seating.
Pull the dishwasher forward from the cabinet opening to access the rear panel and hose connections.
Locate the drain hose where it exits the dishwasher sump or pump housing and loosen the retaining clamp with pliers or a screwdriver.
Trace the hose to the sink drain, garbage disposal, or air gap connection and disconnect it at that end, placing a towel underneath to catch residual water.
Inspect the old hose for kinks, internal blockages, cracks, or collapse, and verify the sink drain path and disposal knockout plug have been removed.
Route the new Bosch drain hose from the pump connection to the sink or disposal, maintaining a high loop or air gap per local code, and secure both ends with new hose clamps.
Reinstall the pump cover and filter assembly, ensuring the cover clicks firmly into place and the filter threads down completely.
Slide the dishwasher back into position, restore power and water supply, and run a short rinse cycle to confirm the unit drains fully without leaks.

The Part You Need

Part	Notes
Bosch dishwasher drain hose assembly	Amazon \| Find your exact model and serial number on the label inside the door edge or on the side of the tub to match the correct hose length and diameter for your unit.
Hose clamps or retaining clips	Amazon \| Stainless steel or OEM plastic clamps to secure the hose at the pump outlet and the sink or disposal connection.

If this part is failing you may also see one of these codes:

When to Call a Pro

If cleaning the filter, reseating the pump cover, and clearing the drain path do not resolve standing water or error codes, or if you find the drain pump itself is jammed or damaged, call a qualified appliance technician. A pro can test the pump motor, check for wiring faults, and replace the pump assembly if needed. Also call for help if you are uncomfortable working behind a built-in dishwasher, if local plumbing codes require an air gap or backflow device you are unsure how to install, or if the new hose still does not drain properly after replacement.