BoilerFaultCodesWorcester Bosch 1037 Fault Code
The Worcester Bosch 1037 fault code means: your boiler has lost contact with its outdoor thermometer, so it is running at a pre-set steady temperature to keep your home warm while it ignores external weather changes.. It appears on 9 Worcester Bosch models in our database.
Technical description: Outside temp. sensor faulty - heating back-up operation active
What causes the Worcester Bosch 1037 fault?
This fault occurs when the boiler's control board can no longer detect a signal from the sensor located on the outside of your home. The most common reasons are that the external sensor has developed an electrical fault due to moisture ingress, or the thin wiring connecting it to the boiler has become damaged or disconnected.
This fault often comes to light during autumn or winter when the boiler first attempts to use weather data to adjust your heating for the colder weather.
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 fault code
Click a model for the full fault code list and model-specific repair notes.
- Greenstar 2000 Repair: £120-200
- Greenstar 27CDi Repair: £120-200
- Greenstar 28CDi Repair: £120-200
- Greenstar 4000 Repair: £120-200
- Greenstar 8000 Repair: £120-200
- Greenstar 8000 Life Repair: £100-200
- Greenstar 8000 Life System Repair: £120-200
- Greenstar 8000 Life/Style Repair: £90-160
- Greenstar 8000 Style Repair: £120-200
Source
Worcester Bosch 1037 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