BoilerFaultCodesWorcester Bosch 1037 W Fault Code
Also written as 1037W — same fault.
The Worcester Bosch 1037 W fault code means: your boiler has lost connection with its outdoor thermometer, meaning it might not adjust its heating efficiently based on the weather outside.. It appears on 11 Worcester Bosch models in our database.
Technical description: Outside temperature sensor is defective – check the connecting lead
What causes the Worcester Bosch 1037 W fault?
This fault occurs when the boiler can no longer receive data from the sensor mounted on the outside of your home. The most common reasons are physical damage to the external unit from the elements or a break in the low-voltage wiring connecting the sensor to the boiler's main control board.
This fault is often identified during autumn or winter when the heating is first turned back on and the boiler attempts to use weather data to regulate the temperature.
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 1037 W fault code
Click a model for the full fault code list and model-specific repair notes.
- 24 RSF Repair: £90-160
- 26 CDi Xtra Repair: £90-160
- 30i Junior Repair: £90-160
- 35 RSF Repair: £90-160
- Danesmoor Repair: £90-160
- Greenstar 2000 Repair: £90-160
- Greenstar 8000 Life/Style Repair: £90-160
- Heatslave Repair: £90-160
- Hideaway Repair: £90-160
- Junior 24i Repair: £90-160
- Junior 28i Repair: £90-160
Source
Worcester Bosch 1037 W 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