PartsFinder UK

F23

Error code

high severity Bosch

F23 Error: Your Bosch dishwasher has displayed the F23 error code on it

Your Bosch dishwasher has displayed the F23 error code on its display panel, which indicates a heating circuit fault. In practical terms, this means your dishwasher is unable to heat water properly during the wash cycle, either because the heating element has failed or the thermostat that controls the temperature isn't working as it should. Whilst this is classified as a high-severity fault, the good news is that many F23 errors can be resolved without calling out an engineer, potentially saving you considerable expense. The most common culprits behind this error are a faulty heating element, a broken thermostat, or occasionally a damaged temperature sensor. These are components that experience regular wear and tear during normal use, so their failure isn't unusual in older machines. Before you resign yourself to a repair bill, it's worth investigating whether any of these parts need replacing. Many are accessible without specialist knowledge, and replacement parts are readily available online at reasonable prices. The following sections will walk you through diagnosing the exact cause of your F23 error and guide you through potential solutions.

Diagnostic Steps

  1. 1

    Step 1

    Check heating element resistance with multimeter

  2. 2

    Step 2

    Inspect thermal cut-out fuse

  3. 3

    Step 3

    Check NTC sensor readings

  4. 4

    Step 4

    Replace heating element or thermostat as required

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

Frequently Asked Questions

What does the F23 error mean on a Bosch dishwasher?↓
Your Bosch dishwasher has displayed the F23 error code on its display panel, which indicates a heating circuit fault. In practical terms, this means your dishwasher is unable to heat water properly during the wash cycle, either because the heating element has failed or the thermostat that controls the temperature isn't working as it should. Whilst this is classified as a high-severity fault, the good news is that many F23 errors can be resolved without calling out an engineer, potentially saving you considerable expense. The most common culprits behind this error are a faulty heating element, a broken thermostat, or occasionally a damaged temperature sensor. These are components that experience regular wear and tear during normal use, so their failure isn't unusual in older machines. Before you resign yourself to a repair bill, it's worth investigating whether any of these parts need replacing. Many are accessible without specialist knowledge, and replacement parts are readily available online at reasonable prices. The following sections will walk you through diagnosing the exact cause of your F23 error and guide you through potential solutions.
Can I fix the F23 error myself?↓
Many F23 faults can be resolved by a competent DIYer. Always disconnect from mains power first. If unsure, consult a qualified engineer.

Quick Summary

Code
F23
Brand
Bosch
Parts to check
0