Bosch Dishwasher Error Code E27: Meaning and Fix
Reading the dishwasher display
A dishwasher reports its fault in the display window, or by blinking a cycle light a set number of times with a pause between groups. Count the blinks and pauses before opening the door. Bosch shows the code with a leading E and a number on both dishwashers and washers.
Bosch (part of BSH Home Appliances) uses E-numbered codes on dishwashers and washers. Its dishwashers share control platforms with Thermador and Gaggenau, so the same fault can appear on those brands. The codes apply to model numbers such as SHPM65Z55N, SHE53T55UC and WAT28400UC; check the label on your unit to confirm yours.
What causes E27
- Low or unstable household voltage, or a loose outlet/plug
- A failing power-supply section on the control board
- A tripped GFCI or a shared circuit overloaded by other appliances
- A loose neutral at the junction box under the sink
How to fix it
- Plug the appliance directly into a wall outlet (no extension cord or surge strip) and check the breaker.
- Measure the outlet voltage; it should sit within roughly 10 percent of the nominal value on the data plate.
- Have the circuit tested with a meter and tighten the wire nuts in the junction box.
- Check for scorched plug blades or a loose plug and replace damaged parts.
- Cut power for several minutes, restore it and run a short cycle.
- If the code returns on a healthy supply, have the control board power section tested or replaced.
Parts you may need
| Part | Part no. | Buy |
|---|---|---|
| Dishwasher Control Board | 00676960 | Find part |
Part numbers are OEM references; confirm fit by your model number before ordering. Some links are affiliate links; we may earn a commission at no extra cost to you.
Questions
What does error E27 mean on a Bosch dishwasher?
The machine saw a mains voltage outside its operating window. Exact behavior can vary by model and software version; confirm against your own manual.
Can I keep using my dishwasher while E27 is showing?
Better not to. Running on bad voltage can damage motors and electronics.
How do I clear E27, and can I fix it myself?
Cancel the program, switch the appliance off and leave it unplugged (or the breaker off) for about five minutes, then restart. The code only stays cleared if the underlying problem is fixed, so work through the steps above. Parts here involve electronics, heating or sealed components, so consider a qualified technician if the basic checks do not clear it.
Other Bosch dishwasher codes
Sources
Part numbers are OEM references; confirm fit by your model number before ordering. Meanings compiled from manufacturer and parts-retailer documentation; see sources below. Unplug the appliance before opening it.
Applies to models including SHPM65Z55N, SHE53T55UC, SHX53TL5UC, SHEM63W55N.