2963
The heat exchanger sensor or both supply and heat exchanger sensors are defect
Worcester Bosch Greenstar 8000 F Regular
Remedy
Check the flow through the appliance and the system is filled.
Check for air locks in the system and purge if required.
Check the resistance of the temperature sensor and replace if required.
Check the continuity of the temperature sensor harness and replace if required.
This code also applies to: