What this error means
Heating System Fault
The E09 error code on Bosch, Siemens, and Neff dishwashers usually indicates a problem with the heating system. In most cases, this means the appliance is not able to heat the water properly during a wash cycle. The issue is commonly linked to a faulty heating element or a problem within the heat pump unit, which combines the heater and circulation pump in modern machines.
Also known as: Same as Bosch & Neff E09
What you'll need first
Add all tools to Amazon basket →Affiliate links — we may earn a small commission at no extra cost to you.
Step-by-step
Symptoms to look for
- Dishes are still wet or cold at the end of a cycle
- Cleaning performance is poor, especially on greasy items
- The cycle may stop unexpectedly or not complete properly
- The dishwasher runs but doesn’t seem to generate heat
- Error code E09 appears on the display
Diagnostic steps
Remove the side or bottom panels (depending on the model). The heat pump is typically located at the base of the dishwasher.
Check for loose, damaged, or burnt wires connected to the heating unit. Repair or reconnect as needed.
Use a multimeter to check for continuity. If the heating element shows no continuity, it has likely failed and needs replacing.
On many modern Bosch, Siemens, and Neff machines, the heating element is integrated into the heat pump. If faulty, the entire unit usually needs to be replaced.
When to call an engineer
- You’re not confident working with electrical appliances
- The heat pump needs replacing and you’re unsure how to fit it
- The error returns even after replacing parts
- There are signs of water damage or leaks inside the machine
- Your dishwasher is still under warranty (to avoid voiding it)
Frequently asked questions
Is E09 a serious fault?
Can I still use the dishwasher with E09?
How much does it cost to fix?
Why did this happen?
Can I prevent this error?
This video shows you how to replace the heat pump on a Bosch, Siemens or Neff Dishwasher
- Accessing the pump
- Removing the cables
- Removal and installation of the heat pump
🎯 What is likely causing this fault?
⚠️ Estimates based on common faults — not a guaranteed diagnosis. Always verify before ordering parts.
Parts you may need
Enter your model number to filter results to your exact machine
Usually found on a label inside the door frame or on the back panel of the machine.
| Part | Approx. UK Cost | Find it |
|---|---|---|
| Heating element | £30 - £40 | 🛒 Amazon UK → |
| NTC sensor | £20 - £30 | 🏷️ eBay UK → |
| Multimeter general item | £10 - £20 | 🛒 Amazon UK → |
ℹ️ Prices are approximate. Always check the part number matches your model before ordering. Not sure of your model number? Find out how to locate it here.