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Troubleshooting Your Prima Dishwasher E4 Error Code
Having a blinking E4 error code on your Prima dishwasher could be nerve-wracking if you didn’t know what such a signal meant. Well, here you end up with piled dishes, with water lying just at the bottom of your appliance-sufficient to throw off an evening routine. Don’t sweat it, though. An E4 error is not ominous in nature and in most cases could be resolved on your own, without seeking repair people’s intervention.
Here, I will guide you on what E4 error code is, what its causes are, and how it’s fixed in step-by-step action. Put down that toolbox for the meantime-this might be simpler than what you’ve thought.

What does the E4 Error Code Mean?
The E4 error code generally means there is a leak or overfilling problem in your dishwasher. That’s about it-the sensor of the dishwasher has sensed water somewhere it shouldn’t be. Maybe it has leaked out of the machine, or an internal chamber has filled past its limit. It’s basically your dishwasher telling you, “Help! Something’s not right with the water flow.”
Common Causes of the E4 Error Code
A number of factors can cause this E4 error. Here’s a look at some of the common culprits:
- Overloading of the Dishwasher: Too many dishes packed in tight may interfere with the water flow, resulting in leaks.
- Blocked Spray Arms or Drainage System: If the water can’t circulate properly or can’t drain as it should, it will back up into places it shouldn’t.
- Faulty Door Seal: A worn or damaged door seal can let water leak out and cause the error.
- Improper Leveling: If the dishwasher isn’t leveled, water may collect in places it shouldn’t, thus tricking the sensor.
- Internal Leaks: Other times, it is an issue with the internal part of the machine, such as a loose connection or a cracked part inside.
The good news here is that many of these issues can be resolved without any major intervention.
Step-by-Step Guide to Fix the E4 Error
Before calling in a professional, try these steps to get your Prima dishwasher back in working order:
1. Turn Off the Power
Safety first: unplug the dishwasher from the power source or turn off the circuit breaker. You really don’t want any mishaps while checking things out.
2. Check for Water Leaks
- Gently pull the dishwasher out from under the counter-if it’s a built-in-and look for any visible water on the floor or beneath the unit. Even a small puddle can indicate a leak.
- Check seals at doors. Are they cracked, broken or dirty? These should be cleaned or replaced by an authorized professional.
- Look beneath for potential leaks from hoses or internal parts.
3. Empties the Dishwasher, and then Drain the Water
Remove all dishes, racks, and debris from the machine. If there’s standing water inside, use a towel or sponge to soak it up. Sometimes, this will simply clear out the water and reset the error in the process.
4. Clean the Spray Arms and Filters
- Clogged spray arms or filters can disrupt water flow and potentially cause overfilling.
- Remove the spray arms and run them under warm running water to remove blockages.
- Clean the filter at the bottom of the dishwasher. A clogged filter may be the reason for poor draining.
5. Level the Dishwasher
Check whether your dishwasher is sat level on the floor. Take a spirit level and make sure all sides evenly match. If it’s tilted, adjust the legs. A level dishwasher reduces the chances of water welling up where it shouldn’t.
6. Test the Machine
Once you’ve completed the above steps, plug the dishwasher back in and run a short cycle. Keep an eye on it to see if the E4 error reappears. If it runs smoothly, you’re likely in the clear.
What If the Error Persists?
If you’ve tried all the steps above and the E4 error is still showing, it may be time to enlist professional help. Persistent issues could mean:
- A faulty sensor that requires replacement.
- A cracked or leaking component within the machine.
- Problems with the water inlet valve or pump.
Contact Prima’s customer support or a trusted appliance technician to diagnose and solve the problem.
Preventing E4 Errors in the Future
No one likes to see that error code pop up, so here are a few tips to help keep your machine purring:
- Don’t Overload It: Give your dishes some breathing room; overloading obstructs proper cleaning, which can also cause leaks.
- Clean Regularly: Check periodically for obstructions in spray arms, filters, and the drain.
- Use the Proper Detergent: Too much detergent or application of the wrong type may result in excessive suds, which will bring their own drainage problems.
- Periodically Check for Leaks: It should be part of your routine every few months to check your machine’s seals and hoses for wear and tear.

Wrapping Up
Getting an E4 error on your Prima dishwasher is infuriating, and no one wants to do dishes when their “helper” isn’t working. However, most of the time, a little troubleshooting will get you back in business and your dishwasher up and running.
If you’ve tried these steps and need help solving the problem, don’t hesitate to call in the pros. It’s better to address the issue early rather than risk further damage. And remember, keeping your dishwasher clean and well-maintained will go a long way in preventing future mishaps.
Got any questions or additional tips to share? Drop them in the comments below we’d love to hear your experience!