BoilerFaultCodesWorcester Bosch 1073 Fault Code
The Worcester Bosch 1073 fault code means: your boiler has stopped working because it is unable to accurately measure the temperature of the water inside it, likely due to a loose wire or a faulty sensor connection.. It appears on 9 Worcester Bosch models in our database.
Technical description: Short circuit of the flow temperature sensor
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
Search the official register for a qualified engineer in your area.
Gas Safe Register →Worcester Bosch models that show the 1073 fault code
Click a model for the full fault code list and model-specific repair notes.
- 1000 Repair: £120-220
- Greenstar 2000 Repair: £120-220
- Greenstar 27CDi Repair: £120-220
- Greenstar 28CDi Repair: £120-220
- Greenstar 4000 Repair: £150-250
- Greenstar 8000 Repair: £120-220
- Greenstar 8000 Life Repair: £120-220
- Greenstar 8000 Life System Repair: £150-250
- Greenstar 8000 Style Repair: £150-250
Source
Worcester Bosch 1073 fault code information on this page is sourced and cross-checked against the official Worcester Bosch service / installation manuals for each affected model.
Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026