Bosch dishwashers are known for being reliable, long-lasting appliances, but even they can experience faults. If your Bosch dishwasher is displaying an E24 error code, this usually indicates a drainage issue and you may also notice water pooling in the bottom of your dishwasher. Thankfully, there are several DIY solutions you can try to remedy this before calling in an appliance technician. Read on to find out what to do.
This guide refers to all common models of Bosch dishwashers, including the following:
Clean the Filter
The dishwasher filter plays a big part in its drainage system, and a severely blocked filter can lead to the E24 error code. When the filter is clogged, water flow is obstructed, which means your dishes don’t get properly cleaned and water will pool in the bottom of your dishwasher.
To clean the filter:
- Locate and remove the filter. In most Bosch models, this is found at the bottom underneath the lower spray arm. You will need to pull out the lower dish rack to get access to it.
- Run the filter under your kitchen faucet and use a scrubbing brush to remove grime and food particles.
- If the filter is particularly dirty, it may require soaking to get it completely clean. Soak the filter in a mixture of warm water and detergent for 15 minutes, then scrub it again. Rinse thoroughly to remove all detergent residue.
- Put the filter back in place, ensuring it is properly seated in its housing—a loose filter can lead to debris getting stuck in your dishwasher’s internal mechanisms.
- Run a test cycle to see whether the error code has cleared and your dishwasher is draining properly.
Run a Cleaning Cycle
If the error code persists after cleaning the filter, your dishwasher may benefit from running a cleaning cycle. This can clear out any soap scum, grease, or food debris that might be blocking the drainage system.
To do this:
- Ensure your dishwasher is empty and the filter is clean.
- Purchase dishwasher cleaner. There are a number of commercial brands available from the supermarket.
- Follow the manufacturer’s instructions for how to use the product. Most require that you place them upside down on the top rack of your dishwasher.
- Choose a high-temperature cleaning cycle for maximum cleaning efficacy.
- Run the hot cycle and check to see if the error code returns.
Check the Drain Hose
A blocked or kinked drain hose may prevent your Bosch dishwasher from draining properly, which will result in an E24 error code. To figure out if the drain hose is causing the error:
- Unplug the dishwasher from the power source.
- Locate the drain hose. Depending on how your dishwasher is installed, the hose may be underneath your kitchen sink, or it may be located behind your dishwasher. You might have to use a furniture dolly to move your dishwasher away from the wall.
- Check to see if the drainage hose is bent or kinked. If it is, straighten the hose so that the water can drain freely.
- If it appears straight, check the hose for clogs. With a bucket and towels on hand to catch any residual water, disconnect the drain hose from your dishwasher and remove the other end from the drainage pipe. Then flush the hose with running water to clear any clogs. You might need to use a length of wire or a long brush to clear particularly stubborn clogs.
- Once the water is running freely through the hose, reattach it to the dishwasher and run a test cycle to see if the error code has gone.
Check the Air Gap
A dishwasher air gap is a cylinder that connects your dishwasher drainage to your kitchen sink. It prevents water from flowing out during your dishwasher’s cleaning cycle and stops dirty water from soiling your clean dishes. If there is a fault with your air gap, it can cause drainage issues, leading to the E24 error code.
To check this:
- Locate the air gap. This will appear as a small cylinder on your kitchen countertop.
- Remove the air gap cover to access the interior
- Check for visible debris inside the air gap. Use a paper towel or rag to clean out any clogs or debris inside—it needs to be clean and unobstructed in order to work.
- Once clean, run a test cycle to see if your dishwasher is now draining properly.
Inspect the Drain Pump
If you’ve ruled out the other issues in our guide, the drain pump could be blocked. Sometimes, the drain pump can get blocked by food particles or bits of debris, such as broken crockery or cherry pits. This can impact on its drainage capabilities, and lead to the E24 error code.
To fix this:
- Disconnect your dishwasher from the power outlet.
- Remove the lower dish rack and filter to gain access to the drain pump. You may have to remove the bottom panel of your dishwasher. Consult your Bosch manual to see specific instructions for your model of dishwasher.
- Check for obstructions in the drain pump.
- Use tweezers or your fingers to carefully remove any debris you find, then check that the pump’s impeller can rotate freely. Once all blockages are cleared, it should spin easily.
- Once all debris is cleared, put everything back into place and restore power to your Bosch dishwasher.
- Run a cleaning cycle to ensure that the error code has been cleared.