PartsFinder UK

E43

Error code

high severity Bosch

E43 Error: You've likely just noticed the E43 code flashing on your Bos

You've likely just noticed the E43 code flashing on your Bosch dishwasher's display, and you're probably wondering what's gone wrong. The good news is that you're not dealing with a catastrophic breakdown—this error simply indicates a problem with your dishwasher's control module, the circuit board that tells your appliance what to do. Think of the control module as your dishwasher's brain. When it malfunctions, the appliance can't communicate with its various parts, which is why you're seeing this error code. Whilst this sounds serious, many E43 faults are actually quite straightforward to resolve without calling out an expensive engineer. The most likely culprit is the main control board itself, which can sometimes be reset or, in some cases, replaced. However, before you assume the worst, it's worth checking a few things first. Sometimes poor electrical connections or water damage to components can trigger this code. We'll walk you through the most common causes and explain which parts typically need investigating, helping you decide whether this is a DIY job or whether you need professional assistance.

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Diagnostic Steps

  1. 1

    Step 1

    Reset the machine (unplug for 10 minutes)

  2. 2

    Step 2

    Check all wiring harness connections to the board

  3. 3

    Step 3

    Inspect for signs of burning or corrosion on the board

  4. 4

    Step 4

    Replace the control module if reset does not resolve

⚠️ 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 E43 error mean on a Bosch dishwasher?↓
You've likely just noticed the E43 code flashing on your Bosch dishwasher's display, and you're probably wondering what's gone wrong. The good news is that you're not dealing with a catastrophic breakdown—this error simply indicates a problem with your dishwasher's control module, the circuit board that tells your appliance what to do. Think of the control module as your dishwasher's brain. When it malfunctions, the appliance can't communicate with its various parts, which is why you're seeing this error code. Whilst this sounds serious, many E43 faults are actually quite straightforward to resolve without calling out an expensive engineer. The most likely culprit is the main control board itself, which can sometimes be reset or, in some cases, replaced. However, before you assume the worst, it's worth checking a few things first. Sometimes poor electrical connections or water damage to components can trigger this code. We'll walk you through the most common causes and explain which parts typically need investigating, helping you decide whether this is a DIY job or whether you need professional assistance.
Can I fix the E43 error myself?↓
Many E43 faults can be resolved by a competent DIYer. Always disconnect from mains power first. If unsure, consult a qualified engineer.

Quick Summary

Code
E43
Brand
Bosch
Parts to check
1