Possible Causes of error E19:

• Faulty heating element: 
  • The element responsible for heating the water might be malfunctioning, taking longer to heat the water or failing to reach the desired temperature.
• Temperature sensor (NTC) issue: 
  • This sensor measures water temperature and sends information to the control board. A malfunctioning sensor could send incorrect readings, leading the machine to believe heating is necessary even when it's not, resulting in extended heating cycles and the E19 error.
• Blocked water flow: 
  • If the water flow through the heating element is restricted due to clogged hoses, scale buildup, or other issues, it can affect the heating efficiency and trigger the E19 error.
• Control board error: 
  • In rare cases, the control board managing the washing process might malfunction and misinterpret sensor signals, causing the heating cycle to extend beyond its intended duration and leading to the E19 error.

Important Note:

Due to the potential for electrical components and delicate parts involved, it's strongly recommended to avoid any DIY troubleshooting for the E19 error. Incorrect handling could damage the machine, create electrical hazards, or even lead to water leaks.

Recommended Action:

1. Contact Bosch customer service immediately: Inform them of the E19 error code and your model number. They can provide expert advice based on your specific machine and offer solutions like:
   • Scheduling a qualified technician visit for safe diagnosis and repair.
   • Guiding you on potential safety measures based on the severity of the issue (e.g., unplugging the machine if necessary).
2. Do not attempt to reset the machine: While resets help with some errors, it's not recommended for E19 as it might not resolve the underlying issue and could potentially worsen it.
3. Unplug the machine: As a safety precaution, unplug the machine from the power outlet until a qualified technician can assess the issue.

Additional Tips:

• Having your model number readily available when contacting customer service will expedite the process.
• If you suspect a potential leak due to unexpected heating, turn off the water supply to the machine as an extra precaution. However, prioritize contacting Bosch customer service first for expert guidance.
• Remember, safety is paramount. Leave the diagnosis and repair to qualified professionals to ensure your Bosch washing machine is fixed correctly and operates safely again.