Fault 54 Code 145 — Thermal disinfection temperature not reached or pump too low

What does Fault 54 145 mean?

The Worcester Bosch Greenstar CDi Boiler displays Fault 54 with code 145, indicating that the required temperature for thermal disinfection has not been reached in the solar cylinder, possibly due to a low maximum temperature setting or insufficient disinfection pump delivery rate.

• Maximum temperature setting for the solar cylinder is too low
• Delivery rate of the disinfection pump (PE) is too low
• Flow restrictor on the pump is not open enough

Click steps to track your progress.

1. 1

   Access the system settings and set a higher maximum temperature for the solar cylinder (refer to 'limit cylinder temperature' in your manual).

2. 2

   Check the disinfection pump (PE) settings and set a higher pump speed, if adjustable.

3. 3

   If applicable, open the flow restrictor on the disinfection pump more.

4. 4

   Monitor the system to see if the disinfection temperature is reached. If the issue persists, contact a qualified heating engineer.