PartsFinder UK

E27

Error code

medium severity Siemens

E27 Error: Your Siemens dishwasher is showing an E27 error code on the

Your Siemens dishwasher is showing an E27 error code on the display, which means the appliance has detected that the mains voltage being supplied to it is too low. In practical terms, your dishwasher isn't receiving enough electrical power to operate safely, so it has shut down to protect itself and its internal components from damage. The good news is that E27 faults are often straightforward to resolve, and many homeowners find they can diagnose and fix the problem themselves without calling an engineer. The issue typically stems from either an unstable power supply to your kitchen or a fault with the dishwasher's main control module, which is the circuit board responsible for managing all the appliance's functions. Before assuming the worst, start by checking your home's electrics. Ensure the dishwasher is plugged into a working socket and that no other high-power appliances are running simultaneously on the same circuit, as this can cause voltage dips. If other electrical items are functioning normally, the main control module is likely the culprit and may need replacing. We'll walk you through the diagnostic steps to pinpoint the exact cause.

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Diagnostic Steps

  1. 1

    Step 1

    Check with an electrician that mains voltage is correct (230V ±10%)

  2. 2

    Step 2

    Try a different mains socket

  3. 3

    Step 3

    If voltage is correct, the control board may have a faulty voltage sensor

⚠️ Always disconnect your appliance from mains power before starting any repair. If in doubt, consult a qualified engineer.

Parts to Check in order of probability

1
control professional

Main Control Module (PCB)

OEM: 00648858

# Main Control Module (PCB) If your Bosch or Siemens dishwasher has stopped responding to button presses, won't cycle through programmes, or displays error codes, a faulty control module is likely the culprit. This component manages all the appliance's functions, so when it fails through age or electrical damage, your dishwasher becomes unusable. This replacement Main Control Module, reference 00648858, restores full functionality to compatible Bosch and Siemens models. It's a moderately challenging repair job, rated 4 out of 5 for difficulty, so expect to spend a couple of hours on installation if you're reasonably handy. Before you begin, take a photograph of the control panel layout and any cable connections. This simple step saves frustration when reassembling, as the module involves multiple electrical connections that must be correctly positioned. Modern control modules are precision components, so handle yours carefully throughout the installation process to avoid damage. Always verify your dishwasher's E-Nr model number matches the compatibility list before ordering. You'll find this on the appliance's data plate, usually inside the door edge. Ordering the wrong part wastes time and money, so take a moment to check first.

Frequently Asked Questions

What does the E27 error mean on a Siemens dishwasher?↓
Your Siemens dishwasher is showing an E27 error code on the display, which means the appliance has detected that the mains voltage being supplied to it is too low. In practical terms, your dishwasher isn't receiving enough electrical power to operate safely, so it has shut down to protect itself and its internal components from damage. The good news is that E27 faults are often straightforward to resolve, and many homeowners find they can diagnose and fix the problem themselves without calling an engineer. The issue typically stems from either an unstable power supply to your kitchen or a fault with the dishwasher's main control module, which is the circuit board responsible for managing all the appliance's functions. Before assuming the worst, start by checking your home's electrics. Ensure the dishwasher is plugged into a working socket and that no other high-power appliances are running simultaneously on the same circuit, as this can cause voltage dips. If other electrical items are functioning normally, the main control module is likely the culprit and may need replacing. We'll walk you through the diagnostic steps to pinpoint the exact cause.
Can I fix the E27 error myself?↓
Many E27 faults can be resolved by a competent DIYer. Always disconnect from mains power first. If unsure, consult a qualified engineer.

Quick Summary

Code
E27
Brand
Siemens
Parts to check
1